Merge pull request #440 from Unity-Technologies/docs/homepage

Several improvements to Repo Homepage

README.md

 to the wider research and game developer communities. 
 
 ## Features
-* Unity Engine flexibility and simplicity
-* Flexible single-agent and multi-agent support
-* Multiple visual observations (cameras)
-* Discrete and continuous action spaces
+* Unity environment control from Python
+* 10+ sample Unity environments
+* Support for multiple environment configurations and training scenarios
+* Train memory-enhanced Agents using deep reinforcement learning
-* Built-in support for Imitation Learning (coming soon)
+* Built-in support for Imitation Learning
+* Flexible Agent control with On Demand Decision Making
-* Python control interface
-* TensorFlow Sharp Agent Embedding _[Experimental]_
+* Simplified set-up with Docker _(Experimental)_
-For more information on ML-Agents, in addition to installation, and usage
-instructions, see our [documentation home](docs). 
+**For more information, in addition to installation and usage
+instructions, see our [documentation home](docs/README.md).**
 
 We have also published a series of blog posts that are relevant for ML-Agents:
 - Overviewing reinforcement learning concepts
-- [Post]() announcing the winners of our
+- [Post](https://blogs.unity3d.com/2018/02/28/introducing-the-winners-of-the-first-ml-agents-challenge/) announcing the winners of our
 [first ML-Agents Challenge](https://connect.unity.com/challenges/ml-agents-1)
 - [Post](https://blogs.unity3d.com/2018/01/23/designing-safer-cities-through-simulations/)
 overviewing how Unity can be leveraged as a simulator to design safer cities.
 - [A Game Developer Learns Machine Learning](https://mikecann.co.uk/machine-learning/a-game-developer-learns-machine-learning-intent/)
-- [Unity3D Machine Learning – Setting up the environment & TensorFlow for AgentML on Windows 10](https://unity3d.college/2017/10/25/machine-learning-in-unity3d-setting-up-the-environment-tensorflow-for-agentml-on-windows-10/)
 - [Explore Unity Technologies ML-Agents Exclusively on Intel Architecture](https://software.intel.com/en-us/articles/explore-unity-technologies-ml-agents-exclusively-on-intel-architecture)
 
 ## Community and Feedback