CCCamera: Adding 3d support for camera to lock onto a 2d bounds:
CCCamera: Adding 3d support for camera to lock onto a 2d bounds:

* Default camera is 3d, but the default camera is setup so that the projection is on (width, height, vertexZ) of target
* This means that for most users, they won't be able to differentiate between an orthorgraphic/ perspective camera
* The benefit is that "faux" 3d effects, such as orbit camera will now appear correctly
* If a user wants an orthographic camera, they still have that option by passing in the Projection2D arg

hig-ag/CocosSharp,MSylvia/CocosSharp,hig-ag/CocosSharp,haithemaraissia/CocosSharp,TukekeSoft/CocosSharp,MSylvia/CocosSharp,mono/CocosSharp,mono/CocosSharp,zmaruo/CocosSharp,zmaruo/CocosSharp,haithemaraissia/CocosSharp,TukekeSoft/CocosSharp