behavior tree added
Update README.md
Made previousState field protected.
MessageDispatcher: fixed #2, renamed dispatchDelayedMessages to update,
removed time granularity, added MessageTimerTest.
Merge remote-tracking branch 'upstream/master'
Update CHANGES
Fixed Java 6 compatibility.
Update CHANGES
Merge pull request #4 from implicit-invocation/master

behavior tree added
Update CHANGES and CONTRIBUTORS
Behavior trees now use libgdx collections, reflection and logging.
Now Parallel task uses an unordered array to make item removal faster.
Code formatted and license headers updated.
Fixed GWT compatibility.