Merge pull request #1427 from xingsenma/develop

issue #3419 update cocostudio scene to v2.2.2
issue #3419 add a default display when pressed texture is not loaded
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into develop_20131218
Merge pull request #1428 from xingsenma/develop_gui_button

issue #3419 add a default display when pressed texture is not loaded
issue #3419 change setJsonName to setFile for CCComAttribute