CHANGELOG
---------
- **2017-04-01**: 0.1.0
- add updated message event support
- **2017-03-14**: 0.0.4
- add debug level logging to `MessageHandler::update`
- **2017-03-13**: 0.0.3
- fix `UserCreator::glip_user` bug
- **2017-01-01**: 0.0.1
- Initial commit