* Made the BrainParameters internal
* Editing the docs
* [skip-ci] A lot more controversial
* [skip ci] Added formerly serialized as
* Use cached BehaviorParameters
* Added the MLAgents.Demonstrations namespace
* Added the MLAgents.Editor namespace
* Overrided the .demo.meta files due to the change in namespace
* More namespace changes
* Added the sidechannels namespace
* Modified changelog and migrating docs