Refactor CCSprite to eliminate the need to override Init() method in .ctr.  This fixes the label AnchorPoint initialization regression as well.
Refactor CCSprite to eliminate the need to override Init() method in .ctr.  This fixes the label AnchorPoint initialization regression as well.

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