add GAIL GAILMem GAILConfig Class.
add HumanAction record to save expert data.
add tackState future for stack multiple states to let agent knows what happened before.
Unity:
No more detect Closest enemy info. Add different density sensor let agent get more state information on the center of view.
Adjust Start Scene UI manager. Add in game visible rayCast & information that rayCast detect.
Python:
Start use mypy black and flake8 to format Python.
