check to see whether mobile browser supports 'canplaythrough'
Prevent closure compiler from obfuscating fields in XMLHttpRequest for IE
Merge pull request #850 from ShengxiangChen/optimizeForMobileBrowser

check to see whether mobile browser supports 'canplaythrough'
Fixed Parallax position issue when adding a child
Merge pull request #851 from moadib/file_utils

Prevent closure compiler from obfuscating fields in XMLHttpRequest for IE
Merge pull request #855 from smshuja/master

Fixed Parallax position issue when adding a child
Merge branch 'master' of https://github.com/cocos2d/cocos2d-html5 into iss1615_WebGLRendering
Fixed #1615 Optimization performance for TextureAtlas