1. compile extensions !
1. main.cpp
Merge branch 'se' of https://github.com/yinjimmy/cocos2d-x into se

Conflicts:
	CocosDenshion/include/SimpleAudioEngine.h
	cocos2dx/platform/qt/CCDevice.cpp
	extensions/proj.qt/extensions.pro
	samples/Cpp/HelloCpp/proj.qt/HelloCpp.pro
	samples/Cpp/HelloQt/main.cpp