Merge pull request #1 from davebaol/master

Preparing for release 1.3.2
Added steering behaviors.
Removed AIUtils and used libgdx frameId support instead.
Improved Jump behavior's implementation and documentation.
Tests refactoring.
Added TabbedPane widget and improved GUI.
...oops... :)
First attempt to integrate box2d with steering.
- The test now use meter units instead of pixel units (for Box2D part), Character still uses pixels (which is ok).
- Scaled down velocity to match meter units.
Merge pull request #1 from cobolfoo/steer

- The test now use meter units instead of pixel units (for Box2D part), ...
- Added box2d seek test.
- Minor changes and code clean up.
- Added Box2d support for non-independent facing.
- Added test for Box2d collision avoidance behavior.
- Renamed Scene2d tests.
- Minor changes.
- Fixed meters/pixels unit convertion in the raycast collision detector
Merge pull request #2 from cobolfoo/steer

- Fixed meters/pixels unit convertion in the raycast collision detector
Added box2d face behavior test.
Pixels/meters conversion limited to creation and rendering code.
- Fixed Box2dCollisionAvoidanceTest.
- Added infinite loop detection in setRandomNonOverlappingPosition.
Added Arrive and LookWhereYouAreGoing tests for box2d.
Update AUTHORS
- Added Box2dJumpBehaviorTest.
- Added SteerableAdapter.
- Minor changes and code cleanup.