Merge branch 'hotfix-0' into release-v0.4-fix-curiosity-odd

# Conflicts:
#	python/unitytrainers/ppo/trainer.py

CONTRIBUTING.md

 # Contribution Guidelines
 
-Thank you for your interest in contributing to ML-Agents! We are incredibly
-excited to see how members of our community will use and extend ML-Agents.
+Thank you for your interest in contributing to the ML-Agents toolkit! We are incredibly
+excited to see how members of our community will use and extend the ML-Agents toolkit.
 To facilitate your contributions, we've outlined a brief set of guidelines
 to ensure that your extensions can be easily integrated.
 
 as we expect all our contributors to follow it.
 
 Second, before starting on a project that you intend to contribute
-to ML-Agents (whether environments or modifications to the codebase), 
+to the ML-Agents toolkit (whether environments or modifications to the codebase), 
 we **strongly** recommend posting on our 
 [Issues page](https://github.com/Unity-Technologies/ml-agents/issues) and
 briefly outlining the changes you plan to make. This will enable us to provide

README.md

 <img src="docs/images/unity-wide.png" align="middle" width="3000"/>
 
-# Unity ML-Agents (Beta)
+# Unity ML-Agents Toolkit (Beta)
-**Unity Machine Learning Agents** (ML-Agents) is an open-source Unity plugin 
+**The Unity Machine Learning Agents Toolkit** (ML-Agents) is an open-source Unity plugin 
 that enables games and simulations to serve as environments for training
 intelligent agents. Agents can be trained using reinforcement learning,
 imitation learning, neuroevolution, or other machine learning methods through
 These trained agents can be used for multiple purposes, including
 controlling NPC behavior (in a variety of settings such as multi-agent and
 adversarial), automated testing of game builds and evaluating different game
-design decisions pre-release. ML-Agents is mutually beneficial for both game
+design decisions pre-release. The ML-Agents toolkit is mutually beneficial for both game
 developers and AI researchers as it provides a central platform where advances
 in AI can be evaluated on Unity’s rich environments and then made accessible
 to the wider research and game developer communities. 
 * For more information, in addition to installation and usage
 instructions, see our [documentation home](docs/Readme.md).
 * If you have
-used a version of ML-Agents prior to v0.4, we strongly recommend 
+used a version of the ML-Agents toolkit prior to v0.4, we strongly recommend 
 our [guide on migrating from earlier versions](docs/Migrating.md).
 
 ## References
 
 ## Community and Feedback
 
-ML-Agents is an open-source project and we encourage and welcome contributions.
+The ML-Agents toolkit is an open-source project and we encourage and welcome contributions.
 If you wish to contribute, be sure to review our 
 [contribution guidelines](CONTRIBUTING.md) and 
 [code of conduct](CODE_OF_CONDUCT.md).
 * Join our
 [Unity Machine Learning Channel](https://connect.unity.com/messages/c/035fba4f88400000)
-to connect with others using ML-Agents and Unity developers enthusiastic
+to connect with others using the ML-Agents toolkit and Unity developers enthusiastic
-regarding ML-Agents (and, more broadly, machine learning in games).
-* If you run into any problems using ML-Agents, 
+regarding the ML-Agents toolkit (and, more broadly, machine learning in games).
+* If you run into any problems using the ML-Agents toolkit, 
 [submit an issue](https://github.com/Unity-Technologies/ml-agents/issues) and
 make sure to include as much detail as possible.
 
 ## Translations
 
-To make Unity ML-Agents accessible to the global research and
+To make the Unity ML-Agents toolkit accessible to the global research and
 Unity developer communities, we're attempting to create and maintain
 translations of our documentation. We've started with translating a subset
 of the documentation to one language (Chinese), but we hope to continue

docs/API-Reference.md

 
     doxygen dox-ml-agents.conf
 
-`dox-ml-agents.conf` is a Doxygen configuration file for ML-Agents
+`dox-ml-agents.conf` is a Doxygen configuration file for the ML-Agents toolkit
 that includes the classes that have been properly formatted. 
 The generated HTML files will be placed
 in the `html/` subdirectory. Open `index.html` within that subdirectory to 

docs/Background-Machine-Learning.md

 # Background: Machine Learning
 
-Given that a number of users of ML-Agents might not have a formal machine 
+Given that a number of users of the ML-Agents toolkit might not have a formal machine 
-understanding of ML-Agents. However, We will not attempt to provide a thorough 
+understanding of the ML-Agents toolkit. However, We will not attempt to provide a thorough 
 treatment of machine learning as there are fantastic resources online.
 
 Machine learning, a branch of artificial intelligence, focuses on learning 
 several iterations to achieve good performance.
 
 We now switch to reinforcement learning, the third class of
-machine learning algorithms, and arguably the one most relevant for ML-Agents.
+machine learning algorithms, and arguably the one most relevant for the ML-Agents toolkit.
 
 ## Reinforcement Learning
 
 robot, with its own observations about the environment, its own set of actions
 and a specific objective. Thus it is natural to explore how we can
 train behaviors within Unity using reinforcement learning. This is precisely
-what ML-Agents offers. The video linked below includes a reinforcement
-learning demo showcasing training character behaviors using ML-Agents.
+what the ML-Agents toolkit offers. The video linked below includes a reinforcement
+learning demo showcasing training character behaviors using the ML-Agents toolkit.
 
 <p align="center">
     <a href="http://www.youtube.com/watch?feature=player_embedded&v=fiQsmdwEGT8" target="_blank">

docs/Background-TensorFlow.md

 
 As discussed in our 
 [machine learning background page](Background-Machine-Learning.md), many of the
-algorithms we provide in ML-Agents leverage some form of deep learning.
+algorithms we provide in the ML-Agents toolkit leverage some form of deep learning.
-produced by ML-Agents are (currently) in a format only understood by
+produced by the ML-Agents toolkit are (currently) in a format only understood by
-to TensorFlow-related tools that we leverage within ML-Agents.
+to TensorFlow-related tools that we leverage within the ML-Agents toolkit.
 
 ## TensorFlow
 
-GPUs in a desktop, server, or mobile device. Within ML-Agents, when you
+GPUs in a desktop, server, or mobile device. Within the ML-Agents toolkit, when you
 train the behavior of an Agent, the output is a TensorFlow model (.bytes)
 file that you can then embed within an Internal Brain. Unless you implement 
 a new algorithm, the use of TensorFlow is mostly abstracted away and behind 
 TensorFlowSharp. We provide an additional in-depth overview of how to
 leverage [TensorFlowSharp within Unity](Using-TensorFlow-Sharp-in-Unity.md)
 which will become more relevant once you install and start training
-behaviors within ML-Agents. Given the reliance on TensorFlowSharp, the
+behaviors within the ML-Agents toolkit. Given the reliance on TensorFlowSharp, the
 Internal Brain is currently marked as experimental.

docs/Background-Unity.md

 [Tutorials page](https://unity3d.com/learn/tutorials). The 
 [Roll-a-ball tutorial](https://unity3d.com/learn/tutorials/s/roll-ball-tutorial)
 is a fantastic resource to learn all the basic concepts of Unity to get started
-with ML-Agents: 
+with the ML-Agents toolkit: 
 * [Editor](https://docs.unity3d.com/Manual/UsingTheEditor.html)
 * [Interface](https://docs.unity3d.com/Manual/LearningtheInterface.html)
 * [Scene](https://docs.unity3d.com/Manual/CreatingScenes.html)

docs/Basic-Guide.md

 If you are not familiar with the [Unity Engine](https://unity3d.com/unity),
 we highly recommend the [Roll-a-ball tutorial](https://unity3d.com/learn/tutorials/s/roll-ball-tutorial) to learn all the basic concepts of Unity. 
 
-## Setting up ML-Agents within Unity
+## Setting up the ML-Agents Toolkit within Unity
-In order to use ML-Agents within Unity, you need to change some Unity settings first. Also [TensorFlowSharp plugin](https://s3.amazonaws.com/unity-ml-agents/0.4/TFSharpPlugin.unitypackage) is needed for you to use pretrained model within Unity, which is based on the [TensorFlowSharp repo](https://github.com/migueldeicaza/TensorFlowSharp). 
+In order to use the ML-Agents toolkit within Unity, you need to change some Unity settings first. Also [TensorFlowSharp plugin](https://s3.amazonaws.com/unity-ml-agents/0.4/TFSharpPlugin.unitypackage) is needed for you to use pretrained model within Unity, which is based on the [TensorFlowSharp repo](https://github.com/migueldeicaza/TensorFlowSharp). 
-3. Using the file dialog that opens, locate the `unity-environment` folder within the ML-Agents project and click **Open**.
+3. Using the file dialog that opens, locate the `unity-environment` folder within the the ML-Agents toolkit project and click **Open**.
-    **Experimental (.NET 4.6 Equivalent)**
+    **Experimental (.NET 4.6 Equivalent or .NET 4.x Equivalent)**
     3. In **Scripting Defined Symbols**, add the flag `ENABLE_TENSORFLOW`. 
     After typing in the flag name, press Enter.
 6. Go to **File** > **Save Project**
 
 ### Training the environment
 1. Open a command or terminal window. 
-2. Nagivate to the folder where you installed ML-Agents. 
+2. Nagivate to the folder where you installed the ML-Agents toolkit. 
-5. When the message _"Ready to connect with the Editor"_ is displayed on the screen, you can press the :arrow_forward: button in Unity to start training in the Editor.
+5. When the message _"Start training by pressing the Play button in the Unity Editor"_ is displayed on the screen, you can press the :arrow_forward: button in Unity to start training in the Editor.
 
 **Note**: Alternatively, you can use an executable rather than the Editor to perform training. Please refer to [this page](Learning-Environment-Executable.md) for instructions on how to build and use an executable.
 
 
 ## Next Steps
 
-* For more information on ML-Agents, in addition to helpful background, check out the [ML-Agents Overview](ML-Agents-Overview.md) page.
+* For more information on the ML-Agents toolkit, in addition to helpful background, check out the [ML-Agents Toolkit Overview](ML-Agents-Overview.md) page.
 * For a more detailed walk-through of our 3D Balance Ball environment, check out the [Getting Started](Getting-Started-with-Balance-Ball.md) page.
 * For a "Hello World" introduction to creating your own learning environment, check out the [Making a New Learning Environment](Learning-Environment-Create-New.md) page.
 * For a series of Youtube video tutorials, checkout the [Machine Learning Agents PlayList](https://www.youtube.com/playlist?list=PLX2vGYjWbI0R08eWQkO7nQkGiicHAX7IX) page. 

docs/FAQ.md

 
 ### Scripting Runtime Environment not setup correctly
 
-If you haven't switched your scripting runtime version from .NET 3.5 to .NET 4.6, you will see such error message:
+If you haven't switched your scripting runtime version from .NET 3.5 to .NET 4.6 or .NET 4.x, you will see such error message:
-This is because .NET 3.5 doesn't support method Clear() for StringBuilder, refer to [Setting Up ML-Agents Within Unity](Installation.md#setting-up-ml-agent-within-unity) for solution. 
+This is because .NET 3.5 doesn't support method Clear() for StringBuilder, refer to [Setting Up The ML-Agents Toolkit Within Unity](Installation.md#setting-up-ml-agent-within-unity) for solution. 
 
 ### TensorFlowSharp flag not turned on. 
 
 You need to install and enable the TensorFlowSharp plugin in order to use the internal brain. 
 ```
 
-This error message occurs because the TensorFlowSharp plugin won't be usage without the ENABLE_TENSORFLOW flag, refer to [Setting Up ML-Agents Within Unity](Installation.md#setting-up-ml-agent-within-unity) for solution. 
+This error message occurs because the TensorFlowSharp plugin won't be usage without the ENABLE_TENSORFLOW flag, refer to [Setting Up The ML-Agents Toolkit Within Unity](Installation.md#setting-up-ml-agent-within-unity) for solution. 
 
 ### Tensorflow epsilon placeholder error
 

docs/Getting-Started-with-Balance-Ball.md

 # Getting Started with the 3D Balance Ball Environment
 
-This tutorial walks through the end-to-end process of opening an ML-Agents 
+This tutorial walks through the end-to-end process of opening a ML-Agents toolkit
-ML-Agents includes a number of [example environments](Learning-Environment-Examples.md) 
-which you can examine to help understand the different ways in which ML-Agents 
+The ML-Agents toolkit includes a number of [example environments](Learning-Environment-Examples.md) 
+which you can examine to help understand the different ways in which the ML-Agents toolkit 
 can be used. These environments can also serve as templates for new 
 environments or as ways to test new ML algorithms. After reading this tutorial, 
 you should be able to explore and build the example environments.
 
 ## Installation
 
-In order to install and set up ML-Agents, the Python dependencies and Unity, 
+In order to install and set up the ML-Agents toolkit, the Python dependencies and Unity, 
 see the [installation instructions](Installation.md).
 
 ## Understanding a Unity Environment (3D Balance Ball)
 **Vector Observation Space**
 
 Before making a decision, an agent collects its observation about its state 
-in the world. ML-Agents classifies vector observations into two types:
+in the world. The ML-Agents toolkit classifies vector observations into two types:
 **Continuous** and **Discrete**. The **Continuous** vector observation space 
 collects observations in a vector of floating point numbers. The **Discrete** 
 vector observation space is an index into a table of states. Most of the example
 **Vector Action Space**
 
 An agent is given instructions from the brain in the form of *actions*. Like 
-states, ML-Agents classifies actions into two types: the **Continuous** 
+states, ML-Agents toolkit classifies actions into two types: the **Continuous** 
 vector action space is a vector of numbers that can vary continuously. What 
 each element of the vector means is defined by the agent logic (the PPO
 training process just learns what values are better given particular state 
 Reinforcement Learning algorithm called Proximal Policy Optimization (PPO). 
 This is a method that has been shown to be safe, efficient, and more general 
 purpose than many other RL algorithms, as such we have chosen it as the 
-example algorithm for use with ML-Agents. For more information on PPO, 
+example algorithm for use with ML-Agents toolkit. For more information on PPO, 
 OpenAI has a recent [blog post](https://blog.openai.com/openai-baselines-ppo/) 
 explaining it.
 
 python3 learn.py --run-id=<run-identifier> --train 
 ```
 
-When the message _"Ready to connect with the Editor"_ is displayed on the screen, you can press the :arrow_forward: button in Unity to start training in the Editor.
+When the message _"Start training by pressing the Play button in the Unity Editor"_ is displayed on the screen, you can press the :arrow_forward: button in Unity to start training in the Editor.
-The `--train` flag tells ML-Agents to run in training mode. 
+The `--train` flag tells the ML-Agents toolkit to run in training mode. 
 
 **Note**: You can train using an executable rather than the Editor. To do so, follow the intructions in 
 [Using an Execuatble](Learning-Environment-Executable.md).
 default. In order to enable it, you must follow these steps. Please note that 
 the `Internal` Brain mode will only be available once completing these steps.
 
-To set up the TensorFlowSharp Support, follow [Setting up ML-Agents within Unity](Basic-Guide.md#setting-up-ml-agents-within-unity) section.
+To set up the TensorFlowSharp Support, follow [Setting up ML-Agents Toolkit within Unity](Basic-Guide.md#setting-up-ml-agents-within-unity) section.
 of the Basic Guide page.
 
 ### Embedding the trained model into Unity

docs/Glossary.md

-# ML-Agents Glossary
+# ML-Agents Toolkit Glossary
 
  * **Academy** - Unity Component which controls timing, reset, and 
  training/inference settings of the environment. 

docs/Installation-Windows.md

-# Installing ML-Agents for Windows
+# Installing ML-Agents Toolkit for Windows
-ML-Agents supports Windows 10. While it might be possible to run ML-Agents using other versions of Windows, it has not been tested on other versions. Furthermore, ML-Agents has not been tested on a Windows VM such as Bootcamp or Parallels.
+The ML-Agents toolkit supports Windows 10. While it might be possible to run the ML-Agents toolkit using other versions of Windows, it has not been tested on other versions. Furthermore, the ML-Agents toolkit has not been tested on a Windows VM such as Bootcamp or Parallels.
-To use ML-Agents, you install Python and the required Python packages as outlined below. This guide also covers how set up GPU-based training (for advanced users). GPU-based training is not required for the v0.4 release of ML-Agents. However, training on a GPU might be required by future versions and features.
+To use the ML-Agents toolkit, you install Python and the required Python packages as outlined below. This guide also covers how set up GPU-based training (for advanced users). GPU-based training is not required for the v0.4 release of the ML-Agents toolkit. However, training on a GPU might be required by future versions and features.
-[Download](https://www.anaconda.com/download/#windows) and install Anaconda for Windows. By using Anaconda, you can manage separate environments for different distributions of Python. Python 3 is required as we no longer support Python 2. In this guide, we are using Python version 3.6 and Anaconda version 5.1 ([64-bit](https://repo.continuum.io/archive/Anaconda3-5.1.0-Windows-x86_64.exe) or [32-bit](https://repo.continuum.io/archive/Anaconda3-5.1.0-Windows-x86.exe) direct links).
+[Download](https://www.anaconda.com/download/#windows) and install Anaconda for Windows. By using Anaconda, you can manage separate environments for different distributions of Python. Python 3.5 or 3.6 is required as we no longer support Python 2. In this guide, we are using Python version 3.6 and Anaconda version 5.1 ([64-bit](https://repo.continuum.io/archive/Anaconda3-5.1.0-Windows-x86_64.exe) or [32-bit](https://repo.continuum.io/archive/Anaconda3-5.1.0-Windows-x86.exe) direct links).
 
 <p align="center">
     <img src="images/anaconda_install.PNG" 
 
 ## Step 2: Setup and Activate a New Conda Environment
 
-You will create a new [Conda environment](https://conda.io/docs/) to be used with ML-Agents. This means that all the packages that you install are localized to just this environment. It will not affect any other installation of Python or other environments. Whenever you want to run ML-Agents, you will need activate this Conda environment.
+You will create a new [Conda environment](https://conda.io/docs/) to be used with the ML-Agents toolkit. This means that all the packages that you install are localized to just this environment. It will not affect any other installation of Python or other environments. Whenever you want to run ML-Agents, you will need activate this Conda environment.
 
 To create a new Conda environment, open a new Anaconda Prompt (_Anaconda Prompt_ in the search bar) and type in the following command:
 
 
 You should see `(ml-agents)` prepended on the last line.
 
-Next, install `tensorflow`. Install this package using `pip` - which is a package management system used to install Python packages. Latest versions of Tensorflow won't work, so you will need to make sure that you install version 1.4.0. In the same Anaconda Prompt, type in the following command _(make sure you are connected to the internet)_:
+Next, install `tensorflow`. Install this package using `pip` - which is a package management system used to install Python packages. Latest versions of Tensorflow won't work, so you will need to make sure that you install version 1.7.1. In the same Anaconda Prompt, type in the following command _(make sure you are connected to the internet)_:
 
 ```
 pip install tensorflow==1.7.1
 
-ML-Agents depends on a number of Python packages. Use `pip` to install these Python dependencies.
+The ML-Agents toolkit depends on a number of Python packages. Use `pip` to install these Python dependencies.
-If you haven't already, clone the ML-Agents Github repository to your local computer. You can do this using Git ([download here](https://git-scm.com/download/win)) and running the following commands in an Anaconda Prompt _(if you open a new prompt, be sure to activate the ml-agents Conda environment by typing `activate ml-agents`)_:
+If you haven't already, clone the ML-Agents Toolkit Github repository to your local computer. You can do this using Git ([download here](https://git-scm.com/download/win)) and running the following commands in an Anaconda Prompt _(if you open a new prompt, be sure to activate the ml-agents Conda environment by typing `activate ml-agents`)_:
 
 ```
 git clone https://github.com/Unity-Technologies/ml-agents.git
 
-In our example, the files are located in `C:\Downloads`. After you have either cloned or downloaded the files, from the Anaconda Prompt, change to the python directory inside the ML-agents directory:
+In our example, the files are located in `C:\Downloads`. After you have either cloned or downloaded the files, from the Anaconda Prompt, change to the python directory inside the ml-agents directory:
 
 ```
 cd C:\Downloads\ml-agents\python
 
 ```
 pip install .
-
-This will complete the installation of all the required Python packages to run ML-Agents.
+This will complete the installation of all the required Python packages to run the ML-Agents toolkit.
-## (Optional) Step 4: GPU Training using ML-Agents 
+## (Optional) Step 4: GPU Training using The ML-Agents Toolkit
-GPU is not required for ML-Agents and won't speed up the PPO algorithm a lot during training(but something in the future will benefit from GPU). This is a guide for advanced users who want to train using GPUs. Additionally, you will need to check if your GPU is CUDA compatible. Please check Nvidia's page [here](https://developer.nvidia.com/cuda-gpus).
+GPU is not required for the ML-Agents toolkit and won't speed up the PPO algorithm a lot during training(but something in the future will benefit from GPU). This is a guide for advanced users who want to train using GPUs. Additionally, you will need to check if your GPU is CUDA compatible. Please check Nvidia's page [here](https://developer.nvidia.com/cuda-gpus).
-As of ML-Agents v0.4, only CUDA v9.0 and cuDNN v7.0.5 is supported.
+As of the ML-Agents toolkit v0.4, only CUDA v9.0 and cuDNN v7.0.5 is supported.
-[Download](https://developer.nvidia.com/cuda-toolkit-archive) and install the CUDA toolkit 9.0 from Nvidia's archive. The toolkit includes GPU-accelerated libraries, debugging and optimization tools, a C/C++ (Step Visual Studio 2017) compiler and a runtime library and is needed to run ML-Agents. In this guide, we are using version 9.0.176 (https://developer.nvidia.com/compute/cuda/9.0/Prod/network_installers/cuda_9.0.176_win10_network-exe)).
+[Download](https://developer.nvidia.com/cuda-toolkit-archive) and install the CUDA toolkit 9.0 from Nvidia's archive. The toolkit includes GPU-accelerated libraries, debugging and optimization tools, a C/C++ (Step Visual Studio 2017) compiler and a runtime library and is needed to run the ML-Agents toolkit. In this guide, we are using version 9.0.176 (https://developer.nvidia.com/compute/cuda/9.0/Prod/network_installers/cuda_9.0.176_win10_network-exe)).
 
 Before installing, please make sure you __close any running instances of Unity or Visual Studio__.
 

docs/Installation.md

         width="500" border="10" />
 </p>
 
-## Clone the ml-agents Repository
+## Clone the Ml-Agents Repository
-Once installed, you will want to clone the ML-Agents GitHub repository. 
+Once installed, you will want to clone the ML-Agents Toolkit GitHub repository. 
 
     git clone https://github.com/Unity-Technologies/ml-agents.git
 
 
 ## Install Python (with Dependencies)
 
-In order to use ML-Agents, you need Python 3 along with
+In order to use ML-Agents toolkit, you need Python 3.5 or 3.6 along with
 the dependencies listed in the [requirements file](../python/requirements.txt).
 Some of the primary dependencies include:
 - [TensorFlow](Background-TensorFlow.md) 
 ## Next Steps
 
 The [Basic Guide](Basic-Guide.md) page contains several short 
-tutorials on setting up ML-Agents within Unity, running a pre-trained model, in
+tutorials on setting up the ML-Agents toolkit within Unity, running a pre-trained model, in
 addition to building and training environments.
 
 ## Help

docs/Learning-Environment-Create-New.md

 
 ## Overview
 
-Using ML-Agents in a Unity project involves the following basic steps:
+Using the ML-Agents toolkit in a Unity project involves the following basic steps:
 
 1. Create an environment for your agents to live in. An environment can range from a simple physical simulation containing a few objects to an entire game or ecosystem.
 2. Implement an Academy subclass and add it to a GameObject in the Unity scene containing the environment. This GameObject will serve as the parent for any Brain objects in the scene. Your Academy class can implement a few optional methods to update the scene independently of any agents. For example, you can add, move, or delete agents and other entities in the environment.

docs/Learning-Environment-Design-Agents.md

  
 ### Discrete Vector Observation Space: Table Lookup
 
-You can use the discrete vector observation space when an agent only has a limited number of possible states and those states can be enumerated by a single number. For instance, the [Basic example environment](Learning-Environment-Examples.md#basic) in ML-Agents defines an agent with a discrete vector observation space. The states of this agent are the integer steps between two linear goals. In the Basic example, the agent learns to move to the goal that provides the greatest reward.
+You can use the discrete vector observation space when an agent only has a limited number of possible states and those states can be enumerated by a single number. For instance, the [Basic example environment](Learning-Environment-Examples.md#basic) in the ML-Agents toolkit defines an agent with a discrete vector observation space. The states of this agent are the integer steps between two linear goals. In the Basic example, the agent learns to move to the goal that provides the greatest reward.
 
 More generally, the discrete vector observation identifier could be an index into a table of the possible states. However, tables quickly become unwieldy as the environment becomes more complex. For example, even a simple game like [tic-tac-toe has 765 possible states](https://en.wikipedia.org/wiki/Game_complexity) (far more if you don't reduce the number of observations by combining those that are rotations or reflections of each other).
 

docs/Learning-Environment-Design-Brains.md

 
 The Brain encapsulates the decision making process. Brain objects must be children of the Academy in the Unity scene hierarchy. Every Agent must be assigned a Brain, but you can use the same Brain with more than one Agent. You can also create several Brains, attach each of the Brain to one or more than one Agent.  
 
-Use the Brain class directly, rather than a subclass. Brain behavior is determined by the **Brain Type**. ML-Agents defines four Brain Types:
+Use the Brain class directly, rather than a subclass. Brain behavior is determined by the **Brain Type**. The ML-Agents toolkit defines four Brain Types:
 
 * [External](Learning-Environment-Design-External-Internal-Brains.md) — The **External** and **Internal** types typically work together; set **External** when training your agents. You can also use the **External** brain to communicate with a Python script via the Python `UnityEnvironment` class included in the Python portion of the ML-Agents SDK.
 * [Internal](Learning-Environment-Design-External-Internal-Brains.md) – Set **Internal**  to make use of a trained model.

docs/Learning-Environment-Design.md

 
 Reinforcement learning is an artificial intelligence technique that trains _agents_ to perform tasks by rewarding desirable behavior. During reinforcement learning, an agent explores its environment, observes the state of things, and, based on those observations, takes an action. If the action leads to a better state, the agent receives a positive reward. If it leads to a less desirable state, then the agent receives no reward or a negative reward (punishment). As the agent learns during training, it optimizes its decision making so that it receives the maximum reward over time.
 
-ML-Agents uses a reinforcement learning technique called [Proximal Policy Optimization (PPO)](https://blog.openai.com/openai-baselines-ppo/). PPO uses a neural network to approximate the ideal function that maps an agent's observations to the best action an agent can take in a given state. The ML-Agents PPO algorithm is implemented in TensorFlow and runs in a separate Python process (communicating with the running Unity application over a socket). 
+The ML-Agents toolkit uses a reinforcement learning technique called [Proximal Policy Optimization (PPO)](https://blog.openai.com/openai-baselines-ppo/). PPO uses a neural network to approximate the ideal function that maps an agent's observations to the best action an agent can take in a given state. The ML-Agents PPO algorithm is implemented in TensorFlow and runs in a separate Python process (communicating with the running Unity application over a socket). 
 
 **Note:** if you aren't studying machine and reinforcement learning as a subject and just want to train agents to accomplish tasks, you can treat PPO training as a _black box_. There are a few training-related parameters to adjust inside Unity as well as on the Python training side, but you do not need in-depth knowledge of the algorithm itself to successfully create and train agents. Step-by-step procedures for running the training process are provided in the [Training section](Training-ML-Agents.md). 
 
 
 ## Organizing the Unity Scene
 
-To train and use ML-Agents in a Unity scene, the scene must contain a single Academy subclass along with as many Brain objects and Agent subclasses as you need. Any Brain instances in the scene must be attached to GameObjects that are children of the Academy in the Unity Scene Hierarchy. Agent instances should be attached to the GameObject representing that agent.
+To train and use the ML-Agents toolkit in a Unity scene, the scene must contain a single Academy subclass along with as many Brain objects and Agent subclasses as you need. Any Brain instances in the scene must be attached to GameObjects that are children of the Academy in the Unity Scene Hierarchy. Agent instances should be attached to the GameObject representing that agent.
 
 ![Scene Hierarchy](images/scene-hierarchy.png)
 
 
 ## Environments
 
-An _environment_ in ML-Agents can be any scene built in Unity. The Unity scene provides the environment in which agents observe, act, and learn. How you set up the Unity scene to serve as a learning environment really depends on your goal. You may be trying to solve a specific reinforcement learning problem of limited scope, in which case you can use the same scene for both training and for testing trained agents. Or, you may be training agents to operate in a complex game or simulation. In this case, it might be more efficient and practical to create a purpose-built training scene.
+An _environment_ in the ML-Agents toolkit can be any scene built in Unity. The Unity scene provides the environment in which agents observe, act, and learn. How you set up the Unity scene to serve as a learning environment really depends on your goal. You may be trying to solve a specific reinforcement learning problem of limited scope, in which case you can use the same scene for both training and for testing trained agents. Or, you may be training agents to operate in a complex game or simulation. In this case, it might be more efficient and practical to create a purpose-built training scene.
 
 Both training and testing (or normal game) scenes must contain an Academy object to control the agent decision making process. The Academy defines several properties that can be set differently for a training scene versus a regular scene. The Academy's **Configuration** properties control rendering and time scale. You can set the **Training Configuration** to minimize the time Unity spends rendering graphics in order to speed up training. You may need to adjust the other functional, Academy settings as well. For example, `Max Steps` should be as short as possible for training — just long enough for the agent to accomplish its task, with some extra time for "wandering" while it learns. In regular scenes, you often do not want the Academy to reset the scene at all; if so, `Max Steps` should be set to zero. 
 

docs/Learning-Environment-Examples.md

 # Example Learning Environments
 
-Unity ML-Agents contains an expanding set of example environments which
+The Unity ML-Agents toolkit contains an expanding set of example environments which
 demonstrate various features of the platform. Environments are located in 
 `unity-environment/Assets/ML-Agents/Examples` and summarized below. 
 Additionally, our 

docs/Limitations.md

 As of version 0.3, we no longer support Python 2. 
 
 ### Tensorflow support
-Currently Ml-Agents uses TensorFlow 1.4 due to the version of the TensorFlowSharp plugin we are using. 
+Currently the Ml-Agents toolkit uses TensorFlow 1.7.1 due to the version of the TensorFlowSharp plugin we are using. 

docs/ML-Agents-Overview.md

-# ML-Agents Overview
+# ML-Agents Toolkit Overview
-**Unity Machine Learning Agents** (ML-Agents) is an open-source Unity plugin 
+**The Unity Machine Learning Agents Toolkit** (ML-Agents Toolkit) is an open-source Unity plugin 
 that enables games and simulations to serve as environments for training
 intelligent agents. Agents can be trained using reinforcement learning,
 imitation learning, neuroevolution, or other machine learning methods through
 These trained agents can be used for multiple purposes, including
 controlling NPC behavior (in a variety of settings such as multi-agent and
 adversarial), automated testing of game builds and evaluating different game
-design decisions pre-release. ML-Agents is mutually beneficial for both game
+design decisions pre-release. The ML-Agents toolkit is mutually beneficial for both game
 developers and AI researchers as it provides a central platform where advances
 in AI can be evaluated on Unity’s rich environments and then made accessible
 to the wider research and game developer communities. 
-To make your transition to ML-Agents easier, we provide several background
+To make your transition to the ML-Agents toolkit easier, we provide several background
 pages that include overviews and helpful resources on the 
 [Unity Engine](Background-Unity.md), 
 [machine learning](Background-Machine-Learning.md) and 
 
 The remainder of this page contains a deep dive into ML-Agents, its key
 components, different training modes and scenarios. By the end of it, you
-should have a good sense of _what_ ML-Agents allows you to do. The subsequent
+should have a good sense of _what_ the ML-Agents toolkit allows you to do. The subsequent
 documentation pages provide examples of _how_ to use ML-Agents.
 
 ## Running Example: Training NPC Behaviors
 **training phase**, while playing the game with an NPC that is using its 
 learned policy is called the **inference phase**.
 
-ML-Agents provides all the necessary tools for using Unity as the simulation 
+The ML-Agents toolkit provides all the necessary tools for using Unity as the simulation 
-In the next few sections, we discuss how ML-Agents achieves this and what
+In the next few sections, we discuss how the ML-Agents toolkit achieves this and what
-ML-Agents is a Unity plugin that contains three high-level components: 
+The ML-Agents toolkit is a Unity plugin that contains three high-level components: 
 * **Learning Environment** - which contains the Unity scene and all the game
 characters. 
 * **Python API** - which contains all the machine learning algorithms that are 
         border="10" />
 </p>
 
-_Example block diagram of ML-Agents for our sample game._
+_Example block diagram of ML-Agents toolkit for our sample game._
-We have yet to discuss how ML-Agents trains behaviors, and what role the
+We have yet to discuss how the ML-Agents toolkit trains behaviors, and what role the
 Python API and External Communicator play. Before we dive into those details,
 let's summarize the earlier components. Each character is attached to an Agent,
 and each Agent is linked to a Brain. The Brain receives observations and
 
 ### Built-in Training and Inference
 
-As mentioned previously, ML-Agents ships with several implementations of 
+As mentioned previously, the ML-Agents toolkit ships with several implementations of 
 state-of-the-art algorithms for training intelligent agents. In this mode, the 
 Brain type is set to External during training and Internal during inference. 
 More specifically, during training, all the medics in the scene send their
 
 In the previous mode, the External Brain type was used for training 
 to generate a TensorFlow model that the Internal Brain type can understand
-and use. However, any user of ML-Agents can leverage their own algorithms
+and use. However, any user of the ML-Agents toolkit can leverage their own algorithms
 for both training and inference. In this case, the Brain type would be set
 to External for both training and inferences phases and the behaviors of
 all the Agents in the scene will be controlled within Python.
 one that is successively improved as the environment gradually increases in
 complexity. In our example, we can imagine first training the medic when each 
 team only contains one player, and then iteratively increasing the number of
-players (i.e. the environment complexity). ML-Agents supports setting
+players (i.e. the environment complexity). The ML-Agents toolkit supports setting
 custom environment parameters within the Academy. This allows
 elements of the environment related to difficulty or complexity to be
 dynamically adjusted based on training progress.
 
 ## Additional Features
 
-Beyond the flexible training scenarios available, ML-Agents includes 
+Beyond the flexible training scenarios available, the ML-Agents toolkit includes 
-* **On Demand Decision Making** - With ML-Agents it is possible to have agents 
+* **On Demand Decision Making** - With the ML-Agents toolkit it is possible to have agents 
 request decisions only when needed as opposed to requesting decisions at 
 every step of the environment. This enables training of turn based games, 
 games where agents 
 [here](Feature-Monitor.md).
 
 * **Complex Visual Observations** - Unlike other platforms, where the agent’s
-observation might be limited to a single vector or image, ML-Agents allows
+observation might be limited to a single vector or image, the ML-Agents toolkit allows
 multiple cameras to be used for observations per agent. This enables agents to
 learn to integrate information from multiple visual streams. This can be
 helpful in several scenarios such as training a self-driving car which requires 
 [guide](Using-Docker.md) on how
 to create and run a Docker container.
 
-* **Cloud Training on AWS** - To facilitate using ML-Agents on
+* **Cloud Training on AWS** - To facilitate using the ML-Agents toolkit on
-* **Cloud Training on Microsoft Azure** - To facilitate using ML-Agents on
+* **Cloud Training on Microsoft Azure** - To facilitate using the ML-Agents toolkit on
 Azure machines, we provide a 
 [guide](Training-on-Microsoft-Azure.md)
 on how to set-up virtual machine instances in addition to a pre-configured data science image.
-To briefly summarize: ML-Agents enables games and simulations built in Unity
+To briefly summarize: The ML-Agents toolkit enables games and simulations built in Unity
 to serve as the platform for training intelligent agents. It is designed
 to enable a large variety of training modes and scenarios and comes packed
 with several features to enable researchers and developers to leverage

docs/Migrating.md

-# Migrating from ML-Agents v0.3 to ML-Agents v0.4
+# Migrating from ML-Agents toolkit v0.3 to v0.4
-# Migrating from ML-Agents v0.2 to ML-Agents v0.3
+## Python API
+ * We've changed some of the python packages dependencies in requirement.txt file. Make sure to run `pip install .` within your `ml-agents/python` folder to update your python packages. 
+
+# Migrating from ML-Agents toolkit v0.2 to v0.3
-There are a large number of new features and improvements in ML-Agents v0.3 which change both the training process and Unity API in ways which will cause incompatibilities with environments made using older versions. This page is designed to highlight those changes for users familiar with v0.1 or v0.2 in order to ensure a smooth transition.
+There are a large number of new features and improvements in the ML-Agents toolkit v0.3 which change both the training process and Unity API in ways which will cause incompatibilities with environments made using older versions. This page is designed to highlight those changes for users familiar with v0.1 or v0.2 in order to ensure a smooth transition.
- * ML-Agents is no longer compatible with Python 2. 
+ * The ML-Agents toolkit is no longer compatible with Python 2. 
 
 ## Python Training
  * The training script `ppo.py` and `PPO.ipynb` Python notebook have been replaced with a single `learn.py` script as the launching point for training with ML-Agents. For more information on using `learn.py`, see [here]().

docs/Python-API.md

 # Python API
 
-ML-Agents provides a Python API for controlling the agent simulation loop of a environment or game built with Unity. This API is used by the ML-Agent training algorithms (run with `learn.py`), but you can also write your Python programs using this API. 
+The ML-Agents toolkit provides a Python API for controlling the agent simulation loop of a environment or game built with Unity. This API is used by the ML-Agent training algorithms (run with `learn.py`), but you can also write your Python programs using this API. 
 
 The key objects in the Python API include:
 
 * `worker_id` indicates which port to use for communication with the environment. For use in parallel training regimes such as A3C.
 * `seed` indicates the seed to use when generating random numbers during the training process. In environments which do not involve physics calculations, setting the seed enables reproducible experimentation by ensuring that the environment and trainers utilize the same random seed.
 
-If you want to directly interact with the Editor, you need to use `file_name=None`, then press the :arrow_forward: button in the Editor when the message _"Ready to connect with the Editor"_ is displayed on the screen
+If you want to directly interact with the Editor, you need to use `file_name=None`, then press the :arrow_forward: button in the Editor when the message _"Start training by pressing the Play button in the Unity Editor"_ is displayed on the screen
 
 ## Interacting with a Unity Environment
 

docs/Readme.md

-# Unity ML-Agents Documentation
+# Unity ML-Agents Toolkit Documentation
 
 ## Installation & Set-up
  * [Installation](Installation.md)
 
 ## Getting Started
- * [ML-Agents Overview](ML-Agents-Overview.md)
+ * [ML-Agents Toolkit Overview](ML-Agents-Overview.md)
     * [Background: Unity](Background-Unity.md)
     * [Background: Machine Learning](Background-Machine-Learning.md)
     * [Background: TensorFlow](Background-TensorFlow.md)

docs/Training-Curriculum-Learning.md

 accomplish the task. From there, we can slowly add to the difficulty of the task by 
 increasing the size of the wall, until the agent can complete the initially 
 near-impossible task of scaling the wall. We are including just such an environment with 
-ML-Agents 0.2, called Wall Jump.
+the ML-Agents toolkit 0.2, called Wall Jump.
 
 ![Wall](images/curriculum.png)
 
 To see this in action, observe the two learning curves below. Each displays the reward 
 over time for an agent trained using PPO with the same set of training hyperparameters. 
-The difference is that the agent on the left was trained using the full-height wall 
-version of the task, and the right agent was trained using the curriculum version of 
+The difference is that one agent was trained using the full-height wall
+version of the task, and the other agent was trained using the curriculum version of
 the task. As you can see, without using curriculum learning the agent has a lot of 
 difficulty. We think that by using well-crafted curricula, agents trained using 
 reinforcement learning will be able to accomplish tasks otherwise much more difficult. 

docs/Training-Imitation-Learning.md

 3. Set the "Student" brain to External mode.
 4. Link the brains to the desired agents (one agent as the teacher and at least one agent as a student).
 5. In `trainer_config.yaml`, add an entry for the "Student" brain. Set the `trainer` parameter of this entry to `imitation`, and the `brain_to_imitate` parameter to the name of the teacher brain: "Teacher". Additionally, set `batches_per_epoch`, which controls how much training to do each moment. Increase the `max_steps` option if you'd like to keep training the agents for a longer period of time.
-6. Launch the training process with `python3 python/learn.py --train --slow`, and press the :arrow_forward: button in Unity when the message _"Ready to connect with the Editor"_ is displayed on the screen
+6. Launch the training process with `python3 python/learn.py --train --slow`, and press the :arrow_forward: button in Unity when the message _"Start training by pressing the Play button in the Unity Editor"_ is displayed on the screen
 7. From the Unity window, control the agent with the Teacher brain by providing "teacher demonstrations" of the behavior you would like to see.
 8. Watch as the agent(s) with the student brain attached begin to behave similarly to the demonstrations.
 9. Once the Student agents are exhibiting the desired behavior, end the training process with `CTL+C` from the command line.

docs/Training-ML-Agents.md

 # Training ML-Agents
 
-ML-Agents conducts training using an external Python training process. During training, this external process communicates with the Academy object in the Unity scene to generate a block of agent experiences. These experiences become the training set for a neural network used to optimize the agent's policy (which is essentially a mathematical function mapping observations to actions). In reinforcement learning, the neural network optimizes the policy by maximizing the expected rewards. In imitation learning, the neural network optimizes the policy to achieve the smallest difference between the actions chosen by the agent trainee and the actions chosen by the expert in the same situation. 
+The ML-Agents toolkit conducts training using an external Python training process. During training, this external process communicates with the Academy object in the Unity scene to generate a block of agent experiences. These experiences become the training set for a neural network used to optimize the agent's policy (which is essentially a mathematical function mapping observations to actions). In reinforcement learning, the neural network optimizes the policy by maximizing the expected rewards. In imitation learning, the neural network optimizes the policy to achieve the smallest difference between the actions chosen by the agent trainee and the actions chosen by the expert in the same situation. 
-For a broader overview of reinforcement learning, imitation learning and the ML-Agents training process, see [ML-Agents Overview](ML-Agents-Overview.md).
+For a broader overview of reinforcement learning, imitation learning and the ML-Agents training process, see [ML-Agents Toolkit Overview](ML-Agents-Overview.md).
 
 ## Training with learn.py
 
     python3 learn.py <env_name> --run-id=<run-identifier> --train
 
 where 
- * `<env_name>`__(Optional)__ is the name (including path) of your Unity executable containing the agents to be trained. If `<env_name>` is not passed, the training will happen in the Editor. Press the :arrow_forward: button in Unity when the message _"Ready to connect with the Editor"_ is displayed on the screen.
+ * `<env_name>`__(Optional)__ is the name (including path) of your Unity executable containing the agents to be trained. If `<env_name>` is not passed, the training will happen in the Editor. Press the :arrow_forward: button in Unity when the message _"Start training by pressing the Play button in the Unity Editor"_ is displayed on the screen.
  * `<run-identifier>` is an optional identifier you can use to identify the results of individual training runs.
 
 For example, suppose you have a project in Unity named "CatsOnBicycles" which contains agents ready to train. To perform the training:
 | batches_per_epoch | In imitation learning, the number of batches of training examples to collect before training the model.| BC |
 | beta | The strength of entropy regularization.| PPO, BC |
 | brain\_to\_imitate | For imitation learning, the name of the GameObject containing the Brain component to imitate. | BC |
-| buffer_size | The number of experiences to collect before updating the policy model. | PPO, BC |
+| buffer_size | The number of experiences to collect before updating the policy model. | PPO |
 | curiosity\_enc\_size | The size of the encoding to use in the forward and inverse models in the Curioity module. | PPO |
 | curiosity_strength | Magnitude of intrinsic reward generated by Intrinsic Curiosity Module. | PPO |
 | epsilon | Influences how rapidly the policy can evolve during training.| PPO, BC |

docs/Training-on-Amazon-Web-Service.md

 
 ## Preconfigured AMI
 
-We've prepared an preconfigured AMI for you with the ID: `ami-6880c317` in the `us-east-1` region. It was created as a modification of [Deep Learning AMI (Ubuntu)](https://aws.amazon.com/marketplace/pp/B077GCH38C). If you want to do training without the headless mode, you need to enable X Server on it. After launching your EC2 instance using the ami and ssh into it, run the following commands to enable it:
+We've prepared an preconfigured AMI for you with the ID: `ami-18642967` in the `us-east-1` region. It was created as a modification of [Deep Learning AMI (Ubuntu)](https://aws.amazon.com/marketplace/pp/B077GCH38C). If you want to do training without the headless mode, you need to enable X Server on it. After launching your EC2 instance using the ami and ssh into it, run the following commands to enable it:
 
 ```
 //Start the X Server, press Enter to come to the command line
 export DISPLAY=:0
 ```
 
-## Configuring your own Instance
+## Configuring your own instance
-### Installing ML-Agents on the instance
+### Installing the ML-Agents toolkit on the instance
 
 After launching your EC2 instance using the ami and ssh into it:
 

docs/Training-on-Microsoft-Azure-Custom-Instance.md

-# Setting up a Custom Instance on Microsoft Azure for Training
+# Setting up a Custom Instance on Microsoft Azure for Training (works with the ML-Agents toolkit v0.3)
 
 This page contains instructions for setting up a custom Virtual Machine on Microsoft Azure so you can running ML-Agents training in the cloud.
 

docs/Training-on-Microsoft-Azure.md

-# Training on Microsoft Azure
+# Training on Microsoft Azure (works with ML-Agents toolkit v0.3)
 
 This page contains instructions for setting up training on Microsoft Azure through either [Azure Container Instances](https://azure.microsoft.com/services/container-instances/) or Virtual Machines. Non "headless" training has not yet been tested to verify support. 
 
 
 ## Running on Azure Container Instances
 
-[Azure Container Instances](https://azure.microsoft.com/services/container-instances/) allow you to spin up a container, on demand, that will run your training and then be shut down.  This ensures you aren't leaving a billable VM running when it isn't needed.  You can read more about [ML-Agents support for Docker containers here](Using-Docker.md).  Using ACI enables you to offload training of your models without needing to install Python and Tensorflow on your own computer.  You can find [instructions, including a pre-deployed image in DockerHub for you to use, available here](https://github.com/druttka/unity-ml-on-azure).
+[Azure Container Instances](https://azure.microsoft.com/services/container-instances/) allow you to spin up a container, on demand, that will run your training and then be shut down.  This ensures you aren't leaving a billable VM running when it isn't needed.  You can read more about [The ML-Agents toolkit support for Docker containers here](Using-Docker.md).  Using ACI enables you to offload training of your models without needing to install Python and Tensorflow on your own computer.  You can find [instructions, including a pre-deployed image in DockerHub for you to use, available here](https://github.com/druttka/unity-ml-on-azure).

docs/Using-Docker.md

 Notes on argument values:
 - `<container-name>` is used to identify the container (in case you want to interrupt and terminate it). This is optional and Docker will generate a random name if this is not set. _Note that this must be unique for every run of a Docker image._
 - `<image-name>` references the image name used when building the container.
-- `<environemnt-name>` __(Optional)__: If you are training with a linux executable, this is the name of the executable. If you are training in the Editor, do not pass a `<environemnt-name>` argument and press the :arrow_forward: button in Unity when the message _"Ready to connect with the Editor"_ is displayed on the screen.
+- `<environemnt-name>` __(Optional)__: If you are training with a linux executable, this is the name of the executable. If you are training in the Editor, do not pass a `<environemnt-name>` argument and press the :arrow_forward: button in Unity when the message _"Start training by pressing the Play button in the Unity Editor"_ is displayed on the screen.
 - `source`: Reference to the path in your host OS where you will store the Unity executable. 
 - `target`: Tells Docker to mount the `source` path as a disk with this name. 
 - `docker-target-name`: Tells the ML-Agents Python package what the name of the disk where it can read the Unity executable and store the graph. **This should therefore be identical to `target`.**

docs/Using-TensorFlow-Sharp-in-Unity.md

 # Using TensorFlowSharp in Unity (Experimental)
 
-ML-Agents allows you to use pre-trained [TensorFlow graphs](https://www.tensorflow.org/programmers_guide/graphs) inside your Unity games. This support is possible thanks to [the TensorFlowSharp project](https://github.com/migueldeicaza/TensorFlowSharp). The primary purpose for this support is to use the TensorFlow models produced by the ML-Agents own training programs, but a side benefit is that you can use any TensorFlow model.
+The ML-Agents toolkit allows you to use pre-trained [TensorFlow graphs](https://www.tensorflow.org/programmers_guide/graphs) inside your Unity games. This support is possible thanks to [the TensorFlowSharp project](https://github.com/migueldeicaza/TensorFlowSharp). The primary purpose for this support is to use the TensorFlow models produced by the ML-Agents toolkit's own training programs, but a side benefit is that you can use any TensorFlow model.
 
 _Notice: This feature is still experimental. While it is possible to embed trained models into Unity games, Unity Technologies does not officially support this use-case for production games at this time. As such, no guarantees are provided regarding the quality of experience. If you encounter issues regarding battery life, or general performance (especially on mobile), please let us know._
 

docs/Using-Tensorboard.md

 # Using TensorBoard to Observe Training
 
-ML-Agents saves statistics during learning session that you can view with a TensorFlow utility named, [TensorBoard](https://www.tensorflow.org/programmers_guide/summaries_and_tensorboard).
+The ML-Agents toolkit saves statistics during learning session that you can view with a TensorFlow utility named, [TensorBoard](https://www.tensorflow.org/programmers_guide/summaries_and_tensorboard).
 
 The `learn.py` program saves training statistics to a folder named `summaries`, organized by the `run-id` value you assign to a training session.
 
  
 When you run the training program, `learn.py`, you can use the `--save-freq` option to specify how frequently to save the statistics.
 
-## ML-Agents training statistics
+## The ML-Agents toolkit training statistics
 
 The ML-agents training program saves the following statistics:
 

docs/dox-ml-agents.conf

 # title of most generated pages and in a few other places.
 # The default value is: My Project.
 
-PROJECT_NAME           = "ML-Agents"
+PROJECT_NAME           = "ML-Agents Toolkit"
 
 # The PROJECT_NUMBER tag can be used to enter a project or revision number. This
 # could be handy for archiving the generated documentation or if some version

docs/localized/zh-CN/README.md

 <img src="docs/images/unity-wide.png" align="middle" width="3000"/>
 
-# Unity ML-Agents (Beta)
+# Unity ML-Agents 工具包(Beta)
 
 **注意:** 本文档为v0.3版本文档的部分翻译版，目前并不会随着英文版文档更新而更新。若要查看更新更全的英文版文档，请查看[这里](https://github.com/Unity-Technologies/ml-agents)。
 

docs/localized/zh-CN/docs/Learning-Environment-Create-New.md

 本节简要回顾了在 Unity 环境中使用 Agent 时
 如何组织场景。
 
-您需要在场景中包含三种游戏对象才能使用 Unity ML-Agents：
+您需要在场景中包含三种游戏对象才能使用 Unity ML-Agents 工具包：
  * Academy
  * Brain
  * Agent

docs/localized/zh-CN/docs/Learning-Environment-Examples.md

 # 学习环境示例
 
-Unity ML-Agents 中内置了一些搭建好的学习环境的示例，并且我们还在不断增加新的示例，这些示例演示了该平台的各种功能。示例环境位于 
+Unity ML-Agents 工具包中内置了一些搭建好的学习环境的示例，并且我们还在不断增加新的示例，这些示例演示了该平台的各种功能。示例环境位于 
 `unity-environment/Assets/ML-Agents/Examples` 中，并且我们在下文中进行了简单的介绍。
 此外，我们的
 [首届 ML-Agents 挑战赛](https://connect.unity.com/challenges/ml-agents-1)

docs/localized/zh-CN/docs/Readme.md

-# Unity ML-Agents 文档
+# Unity ML-Agents 工具包文档
 
 ## 入门
  * [ML-Agents 概述*](ML-Agents-Overview.md)

python/Basics.ipynb

    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Unity ML-Agents\n",
+    "# Unity ML-Agents Toolkit\n",
-    "This notebook contains a walkthrough of the basic functions of the Python API for Unity ML-Agents. For instructions on building a Unity environment, see [here](https://github.com/Unity-Technologies/ml-agents/blob/master/docs/Getting-Started-with-Balance-Ball.md)."
+    "This notebook contains a walkthrough of the basic functions of the Python API for the Unity ML-Agents toolkit. For instructions on building a Unity environment, see [here](https://github.com/Unity-Technologies/ml-agents/blob/master/docs/Getting-Started-with-Balance-Ball.md)."
    ]
   },
   {
    "source": [
     "### 2. Load dependencies\n",
     "\n",
-    "The following loads the necessary dependencies and checks the Python version (at runtime). ML-Agents (v0.3 onwards) requires Python 3."
+    "The following loads the necessary dependencies and checks the Python version (at runtime). ML-Agents Toolkit (v0.3 onwards) requires Python 3."
    ]
   },
   {
     "\n",
     "# check Python version\n",
     "if (sys.version_info[0] < 3):\n",
-    "    raise Exception(\"ERROR: ML-Agents (v0.3 onwards) requires Python 3\")"
+    "    raise Exception(\"ERROR: ML-Agents Toolkit (v0.3 onwards) requires Python 3\")"
    ]
   },
   {

python/learn.py

-# # Unity ML Agents
+# # Unity ML-Agents Toolkit
 # ## ML-Agent Learning
 
 import logging

python/setup.py

     required = f.read().splitlines()
 
 setup(name='unityagents',
-      version='0.3.0',
+      version='0.4.0',
       description='Unity Machine Learning Agents',
       license='Apache License 2.0',
       author='Unity Technologies',

python/trainer_config.yaml

 
 Ball3DBrain:
     normalize: true
-    batch_size: 1200
+    batch_size: 64
+    lambd: 0.99
     gamma: 0.995
     beta: 0.001
 
     time_horizon: 1000
     gamma: 0.995
     beta: 0.001
-
-BouncerBrain:
-    normalize: true
-    max_steps: 5.0e5
-    num_layers: 2
-    hidden_units: 56
 
 TennisBrain:
     normalize: true

python/unityagents/environment.py

         if file_name is not None:
             self.executable_launcher(file_name, docker_training, no_graphics)
         else:
-            logger.info("Ready to connect with the Editor.")
+            logger.info("Start training by pressing the Play button in the Unity Editor.")
         self._loaded = True
 
         rl_init_parameters_in = UnityRLInitializationInput(

python/unitytrainers/bc/trainer.py

-# # Unity ML Agents
+# # Unity ML-Agents Toolkit
 # ## ML-Agent Learning (Imitation)
 # Contains an implementation of Behavioral Cloning Algorithm
 

python/unitytrainers/models.py

         :param num_layers: number of hidden layers to create.
         :return: List of hidden layer tensors.
         """
-        with tf.name_scope(scope):
+        with tf.variable_scope(scope):
             vector_in = tf.reshape(observation_input, [-1])
             state_onehot = tf.one_hot(vector_in, s_size)
             hidden = state_onehot
         :return: List of encoded streams.
         """
         brain = self.brain
-        if brain.vector_action_space_type == "continuous":
-            activation_fn = tf.nn.tanh
-        else:
-            activation_fn = self.swish
+        activation_fn = self.swish
 
         self.visual_in = []
         for i in range(brain.number_visual_observations):

python/unitytrainers/ppo/models.py

             encoded_next_state_list.append(hidden_next_visual)
 
         if self.o_size > 0:
-            # Create input op for next (t+1) vector observation.
-            self.next_vector_in = tf.placeholder(shape=[None, self.o_size], dtype=tf.float32,
-                                                 name='next_vector_observation')
-            encoded_vector_obs = self.create_continuous_observation_encoder(self.vector_in,
-                                                                            self.curiosity_enc_size,
-                                                                            self.swish, 2, "vector_obs_encoder", False)
-            encoded_next_vector_obs = self.create_continuous_observation_encoder(self.next_vector_in,
-                                                                                 self.curiosity_enc_size,
-                                                                                 self.swish, 2, "vector_obs_encoder",
-                                                                                 True)
+            if self.brain.vector_observation_space_type == "continuous":
+                # Create input op for next (t+1) vector observation.
+                self.next_vector_in = tf.placeholder(shape=[None, self.o_size], dtype=tf.float32,
+                                                     name='next_vector_observation')
+
+                encoded_vector_obs = self.create_continuous_observation_encoder(self.vector_in,
+                                                                                self.curiosity_enc_size,
+                                                                                self.swish, 2, "vector_obs_encoder",
+                                                                                False)
+                encoded_next_vector_obs = self.create_continuous_observation_encoder(self.next_vector_in,
+                                                                                     self.curiosity_enc_size,
+                                                                                     self.swish, 2,
+                                                                                     "vector_obs_encoder",
+                                                                                     True)
+            else:
+                self.next_vector_in = tf.placeholder(shape=[None, 1], dtype=tf.int32,
+                                                     name='next_vector_observation')
+
+                encoded_vector_obs = self.create_discrete_observation_encoder(self.vector_in, self.o_size,
+                                                                              self.curiosity_enc_size,
+                                                                              self.swish, 2, "vector_obs_encoder",
+                                                                              False)
+                encoded_next_vector_obs = self.create_discrete_observation_encoder(self.next_vector_in, self.o_size,
+                                                                                   self.curiosity_enc_size,
+                                                                                   self.swish, 2, "vector_obs_encoder",
+                                                                                   True)
             encoded_state_list.append(encoded_vector_obs)
             encoded_next_state_list.append(encoded_next_vector_obs)
 

python/unitytrainers/ppo/trainer.py

-# # Unity ML Agents
+# # Unity ML-Agents Toolkit
 # ## ML-Agent Learning (PPO)
 # Contains an implementation of PPO as described (https://arxiv.org/abs/1707.06347).
 
                     else:
                         feed_dict[self.model.vector_in] = np.array(buffer['vector_obs'][start:end]).reshape(
                             [-1, self.brain.num_stacked_vector_observations])
+                        if self.use_curiosity:
+                            feed_dict[self.model.next_vector_in] = np.array(buffer['next_vector_in'][start:end]) \
+                                .reshape([-1, self.brain.num_stacked_vector_observations])
                 if self.use_visual_obs:
                     for i, _ in enumerate(self.model.visual_in):
                         _obs = np.array(buffer['visual_obs%d' % i][start:end])

python/unitytrainers/trainer.py

-# # Unity ML Agents
+# # Unity ML-Agents Toolkit
 import logging
 
 import tensorflow as tf

python/unitytrainers/trainer_controller.py

-# # Unity ML Agents
+# # Unity ML-Agents Toolkit
 # ## ML-Agent Learning
 # Launches unitytrainers for each External Brains in a Unity Environment
 

unity-environment/Assets/ML-Agents/Examples/BananaCollectors/Scenes/VisualBanana.unity

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unity-environment/Assets/ML-Agents/Scripts/Academy.cs

 /**
  * Welcome to Unity Machine Learning Agents (ML-Agents).
  * 
- * ML-Agents contains five entities: Academy, Brain, Agent, Communicator and
+ * The ML-Agents toolkit contains five entities: Academy, Brain, Agent, Communicator and
  * Python API. The academy, and all its brains and connected agents live within
  * a learning environment (herin called Environment), while the communicator
  * manages the communication between the learning environment and the Python

unity-environment/Assets/ML-Agents/Scripts/Agent.cs

         /// their own experience.
         int stepCount;
 
-        // Flag to signify that an agent has been reset but the fact that it is
-        // done has not been communicated (required for On Demand Decisions).
+        /// Flag to signify that an agent has been reset but the fact that it is
+        /// done has not been communicated (required for On Demand Decisions).
-        // Flag to signify that an agent is done and should not reset until
-        // the fact that it is done has been communicated.
+        /// Flag to signify that an agent is done and should not reset until
+        /// the fact that it is done has been communicated.
         bool terminate;
 
         /// Unique identifier each agent receives at initialization. It is used
+        /// Array of Texture2D used to render to from render buffer before  
+        /// transforming into float tensor.
+        Texture2D[] textureArray;
+        
+            textureArray = new Texture2D[agentParameters.agentCameras.Count];
+            for (int i = 0; i < brain.brainParameters.cameraResolutions.Length; i++)
+            {
+                textureArray[i] = new Texture2D(brain.brainParameters.cameraResolutions[i].width, 
+                    brain.brainParameters.cameraResolutions[i].height, TextureFormat.RGB24, false);
+            }
             id = gameObject.GetInstanceID();
             Academy academy = Object.FindObjectOfType<Academy>() as Academy;
             OnEnableHelper(academy);
 
             for (int i = 0; i < brain.brainParameters.cameraResolutions.Length; i++)
             {
-                info.visualObservations.Add(ObservationToTexture(
+                ObservationToTexture(
-                    param.cameraResolutions[i].height));
+                    param.cameraResolutions[i].height,
+                    ref textureArray[i]);
+                info.visualObservations.Add(textureArray[i]);
             }
 
             info.reward = reward;
         /// Converts a camera and correspinding resolution to a 2D texture.
         /// </summary>
         /// <returns>The 2D texture.</returns>
-        /// <param name="camera">Camera.</param>
+        /// <param name="obsCamera">Camera.</param>
-        public static Texture2D ObservationToTexture(Camera camera, int width, int height)
+        /// <param name="texture2D">Texture2D to render to.</param>
+        public static void ObservationToTexture(Camera obsCamera, int width, int height, ref Texture2D texture2D)
-            Rect oldRec = camera.rect;
-            camera.rect = new Rect(0f, 0f, 1f, 1f);
+            Rect oldRec = obsCamera.rect;
+            obsCamera.rect = new Rect(0f, 0f, 1f, 1f);
             var depth = 24;
             var format = RenderTextureFormat.Default;
             var readWrite = RenderTextureReadWrite.Default;
-            var tex = new Texture2D(width, height, TextureFormat.RGB24, false);
+            
+            if (width != texture2D.width || height != texture2D.height)
+            {
+                texture2D.Resize(width, height);
+            }
-            var prevCameraRT = camera.targetTexture;
+            var prevCameraRT = obsCamera.targetTexture;
-            camera.targetTexture = tempRT;
+            obsCamera.targetTexture = tempRT;
-            camera.Render();
+            obsCamera.Render();
-            tex.ReadPixels(new Rect(0, 0, tex.width, tex.height), 0, 0);
-            tex.Apply();
-            camera.targetTexture = prevCameraRT;
-            camera.rect = oldRec;
+            texture2D.ReadPixels(new Rect(0, 0, texture2D.width, texture2D.height), 0, 0);
+            texture2D.Apply();
+            obsCamera.targetTexture = prevCameraRT;
+            obsCamera.rect = oldRec;
-            return tex;
         }
     }
 }