Fixes and Improvements
- Fixes typo on documentation.
- Fixes Division by zero error when using recurrent and discrete control.
- Fixes UI bug on Learning Brain warnings with visual observations.
- Fixes Curriculum Learning Brain names.
- Fixes Ctrl-C bug on Windows in which the model would not be saved when training was interrupted.
- Fixes In Editor Training Bug with Docker.
- Fixes Docker Training Bug in which models would not be saved after training was interrupted.