Replace Create factory methods with constructors - CCLabelTTF, CCScene, CCTransitionScene, CCTransitionFade, CCFuncXX

https://github.com/mono/cocos2d-xna/issues/44
https://github.com/mono/cocos2d-xna/issues/57
https://github.com/mono/cocos2d-xna/issues/58
https://github.com/mono/cocos2d-xna/issues/46