add res of music and modify MainMenuScene/resource/GameScenePlayLayer/GameSceneOverLayer.js.
Merge pull request #1 from shujunqiao/myWork

add res of music and modify MainMenuScene/resource/GameScenePlayLayer/Ga...
Merge branch 'master' of https://github.com/yuye-liu/CocostudioIronCity

Conflicts:
	cocos2d-html5_i/IronCity/src/other/AudioPlayer.js
	cocos2d-html5_i/IronCity/src/resource.js
	cocos2d-html5_i/IronCity/src/scene/MainMenuScene.js