Add support for appending data to the state on goToState
Merge pull request #72 from etgryphon/DataTransitionSupport

Add support for appending data to the state on goToState
Merge pull request #70 from apechimp/master

Added createStateTree
Version 0.9.0:  
  - Updated Data API
  - Fixed testing
  - Added getStateTree for visualization
Parse state transitions