Cleanup of CCApplication:
Cleanup of CCApplication:

* fix up how to initialise a CCApplication obj
* incorporate changes to add/render multiple windows

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