Added ability to remove AnimationClip Listeners
Added ability to check if an AnimationClip Listener has been added
Removed "has" functions from AnimationClip
Convert tabs to spaces
Merge pull request #1507 from rcmaniac25/animationclip-remove-listener

AnimationClip Listener removal
Merge branch 'next' of https://github.com/blackberry/GamePlay into next
Removing lua_ContainerDirection.h/.cpp since enum bindings are no longer necessary.