Merge branch 'master' into develop-torch-clip

com.unity.ml-agents.extensions/package.json

   "unity": "2018.4",
   "description": "A source-only package for new features based on ML-Agents",
   "dependencies": {
-    "com.unity.ml-agents": "1.5.0-preview"
+    "com.unity.ml-agents": "1.6.0-preview"
   }
 }

com.unity.ml-agents/CHANGELOG.md

 
 
 ## [Unreleased]
+### Major Changes
+#### com.unity.ml-agents (C#)
+#### ml-agents / ml-agents-envs / gym-unity (Python)
+### Minor Changes
+#### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
+#### ml-agents / ml-agents-envs / gym-unity (Python)
+
+### Bug Fixes
+#### com.unity.ml-agents (C#)
+#### ml-agents / ml-agents-envs / gym-unity (Python)
+
+
+## [1.6.0-preview] - 2020-11-18
 ### Major Changes
 #### com.unity.ml-agents (C#)
 #### ml-agents / ml-agents-envs / gym-unity (Python)
  adding `framework: tensorflow` in the configuration YAML. (#4517)
 
 ### Minor Changes
-#### com.unity.ml-agents (C#)
+#### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
+- Utilities were added to `com.unity.ml-agents.extensions` to make it easier to
+integrate with match-3 games. See the [readme](https://github.com/Unity-Technologies/ml-agents/blob/master/com.unity.ml-agents.extensions/Documentation~/Match3.md)
+for more details. (#4515)
 #### ml-agents / ml-agents-envs / gym-unity (Python)
 - The `action_probs` node is no longer listed as an output in TensorFlow models (#4613).
 

com.unity.ml-agents/CONTRIBUTING.md

 
 ## Environments
 
-We are also actively open to adding community contributed environments as
-examples, as long as they are small, simple, demonstrate a unique feature of the
-platform, and provide a unique non-trivial challenge to modern machine learning
-algorithms. Feel free to submit these environments with a PR explaining the
-nature of the environment and task.
+We are currently not accepting environment contributions directly into ML-Agents.
+However, we believe community created enviornments have a lot of value to the
+community. If you have an interesting enviornment and are willing to share,
+feel free to showcase it and share any relevant files in the
+[ML-Agents forum](https://forum.unity.com/forums/ml-agents.453/).
 
 ## Continuous Integration (CI)
 

com.unity.ml-agents/Runtime/Academy.cs

         /// Unity package version of com.unity.ml-agents.
         /// This must match the version string in package.json and is checked in a unit test.
         /// </summary>
-        internal const string k_PackageVersion = "1.5.0-preview";
+        internal const string k_PackageVersion = "1.6.0-preview";
 
         const int k_EditorTrainingPort = 5004;
 

com.unity.ml-agents/package.json

 {
   "name": "com.unity.ml-agents",
   "displayName": "ML Agents",
-  "version": "1.5.0-preview",
+  "version": "1.6.0-preview",
   "unity": "2018.4",
   "description": "Use state-of-the-art machine learning to create intelligent character behaviors in any Unity environment (games, robotics, film, etc.).",
   "dependencies": {

gym-unity/gym_unity/__init__.py

 # Version of the library that will be used to upload to pypi
-__version__ = "0.22.0.dev0"
+__version__ = "0.23.0.dev0"
 
 # Git tag that will be checked to determine whether to trigger upload to pypi
 __release_tag__ = None

ml-agents-envs/mlagents_envs/__init__.py

 # Version of the library that will be used to upload to pypi
-__version__ = "0.22.0.dev0"
+__version__ = "0.23.0.dev0"
 
 # Git tag that will be checked to determine whether to trigger upload to pypi
 __release_tag__ = None

ml-agents/mlagents/trainers/__init__.py

 # Version of the library that will be used to upload to pypi
-__version__ = "0.22.0.dev0"
+__version__ = "0.23.0.dev0"
 
 # Git tag that will be checked to determine whether to trigger upload to pypi
 __release_tag__ = None