0.2.0 (March 01, 2014)

* Ensure correct transition object state
* Add methods synchronization for thread safety
* Fix bug - callback event object returns correct from state
* Add ability to define custom initial event
* Add hooks class for callbacks registration
* Extend threadable accessors
* Add generic state and event listeners
* Add target to allow integration with external objects,
  and allow easy method lookup through callback context
* Add ability to specify custom handlers for error conditions