ryanza/stateflow — pull request #46 by jamesotron (2013-10-07 23:01:58+00:00)
Title: Add before and after event callbacks.

Add before and after event callbacks.

- Rename `enter` and `exit` to `before_enter` and `before_exit`.
- Alias `enter` to `before_enter`.
- Alias `exit` to `before_exit`.
- Modify transition to call before and after callbacks.