Bonsai-gym-common

Fixed
- Fix a couple of log lines that were using `string.format()`.

Changed
- Rename `GymSimulator` method `_reset_state` to `reset`.

Added
- Added ability to support batches of predictions and states when
communicating with the Bonsai server.

Changed
- Increase the minimum required version of bonsai-python to 0.6.0.

Added
- Add ability to convert README.md into RST using pypandoc.

Added
- Add support for python 2.7.

Changed
- Rename `action` kwarg used in `GymSimulator.set_properties` to `command`.
- Increase the minimum required version of bonsai-python to 0.5.0.

Added
- Add a call to reset simulator state when simulator properties are set.

Fixed
- Fix a bug where simulator state was being reset to often.

Changed
- Increase the minimum required version of bonsai-python to 0.4.0.