Added preview panel
Updated licenses
updated cocos2d-html5 engine file
Fixes issue with keyframes being pasted outside of timeline
Removed comments
Added vision document
Removed not yet used controls in preview pane
Merge pull request #381 from linshun/develop

updated cocos2d-html5 engine file
Merge branch 'develop' of https://github.com/cocos2d/CocosBuilder