Changes:
- creator (static) methods, and singleton methods (static) are always at the top of the class
- Constructors, destructros, and init methods comes next
- Then the instance methods for the class
- Then the overriden methods
- and finally the ivars
Also, overriden methos have the "override" context keyword
1. update all copyright from 2010-2011 to 2010-2012 cocos2d-x.org
2. update COCOS2D_VERSION to 0x00020003
3. update const char* cocos2dVersion() to "cocos2d-2.0-x-2.0.3"