MultiResolution変更。あってるかどうかは微妙

Conflicts:
	oreore/cocos2d/utils/MultiResolution.cpp
	oreore/cocos2d/utils/MultiResolution.h
MultiResolutionとUtils修正

Conflicts:
	oreore/cocos2d/utils/MultiResolution.cpp
	oreore/cocos2d/utils/Utils.h
MultiResolution修正

Conflicts:
	oreore/cocos2d/utils/MultiResolution.cpp
	oreore/cocos2d/utils/MultiResolution.h
OverlayLayerに機能追加

Conflicts:
	oreore/cocos2d/nodes/Overlay.cpp
	oreore/cocos2d/nodes/Overlay.h
MultiResolution修正

Conflicts:
	oreore/cocos2d/utils/MultiResolution.cpp
	oreore/cocos2d/utils/MultiResolution.h
SceneManager更新

Conflicts:
	oreore/cocos2d/utils/SceneManager.cpp