2011-10-06: 1.0.0 (2dd80fc)
- Initial version

2012-02-15: 1.1.0 (8e0573b)
- Add support for tick types

2013-01-17: 2.0.0 (a4664bc)
- Support for Protocol 2.0

2013-05-15: 2.0.1 (af0cba0)
- Don't send threshold callback twice