Merge pull request #940 from ShengxiangChen/issue_comliper

"ccConfig" is invalid when using google closure compiler
Merge pull request #969 from linshun/iss2264_v2.1.4

issue #2264 sync v2.1.4 from develop branch to master branch
Merge pull request #971 from dingpinglv/Iss2144_FixBugForParticleSystem

fixed #2144 modify condition for WebGL Mode.
Merge pull request #973 from linshun/iss2264_v2.1.4

issue #2264: updated changelog
Fixed example code in ccMenuItem.js, line 1147 for ccMenuItemToggle
Merge pull request #991 from mcscooter/master

Fixed example code in ccMenuItem.js
Merge branch 'master' of https://github.com/cocos2d/cocos2d-html5
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5
fixed a bug of cc.SimpleAudioEngine that unload effect doesn't work.
Merge pull request #1021 from dingpinglv/FixCocosDenshionBug

fixed a bug of cc.SimpleAudioEngine that unload effect doesn't work.