Fixed #1643 implement fullPathForFilename,loadFilenameLookup etc.. for CCFileUtils.js
Merge branch 'master' of https://github.com/cocos2d/cocos2d-html5 into Iss1643_CCFileUtils
Fixed #1643 modify conference for samples
Merge pull request #755 from dingpinglv/Iss1643_CCFileUtils

Fixed #1643 implement fullPathForFilename,loadFilenameLookup etc.. for CCFileUtils.js