Fix Grid3DAction to display correctly when TexelToContentSize is different from 1 (one).
+ This affected all GridActions.
+ This was reported against CCShaky3D effect in issue https://github.com/mono/CocosSharp/issues/65
Fix CCNode Grid drawing to draw correctly when applying an effect.
+ Fix Render Target size when applying an effect to a CCSprite that has it's TexelToContentSize pixel ratios different than 1,1.
Fix up TextLayer layout of graphics for Effect Tests
Fix for upcoming version of MonoMac
Fix Memory Leak for events OnCameraVisibleBoundsChanged, SceneViewportChanged and LayerVisibleBoundsChanged.
+ Make sure events are un attached when removed from parent and cleanup = true is specified.
- The problem with the event handlers was that they were being created as "= delete {}" which means that there was no way to really un attach the event handlers once they were created.  So to solve this concrete event handler delegates were created which resolves this issue.

This should clear the issue https://github.com/mono/CocosSharp/issues/66
Fix visibility of first sprite disappearing when attached to SpriteBatchNode and more sprites are later added.  Issue 56
+ See issue : https://github.com/mono/CocosSharp/issues/56
+ Forum discussion: http://forums.xamarin.com/discussion/27220/ccspritebatchnode-issue
A little cleanup of Actions in SpriteBatchNode1
Merge remote-tracking branch 'upstream/master'