First MouseInteractionManager commit.
MouseInteractionManager :

- Class rename.
- Bugs fixed.
- Documentation added.

needs:

- FlxTouch support
- More testing
Sprite rotation support added - awesomeness.
Touch support added to MouseInteractionMgr, needs testing tho.
AddSpirte unshift() added.
Merge pull request #260 from ProG4mr/flixelNME

MouseInteractionManager plugin added.