* Now your `Env` and `Wrapper` subclasses should define `step`, `reset`, `render`, `close`, `seed` rather than underscored method names.
* Removed the `board_game`, `debugging`, `safety`, `parameter_tuning` environments since they're not being maintained by us at OpenAI. We encourage authors and users to create new repositories for these environments.
* Changed `MultiDiscrete` action space to range from `[0, ..., n-1]` rather than `[a, ..., b-1]`.
* No more `render(close=True)`, use env-specific methods to close the rendering.
* Removed `scoreboard` directory, since site doesn't exist anymore.
* Moved `gym/monitoring` to `gym/wrappers/monitoring`
* Add `dtype` to `Space`.
* Not using python's built-in module anymore, using `gym.logger`