issue #4221 update cocostudio to 3.0
Merge branch 'tests_js_3.0' of https://github.com/cocos2d/cocos2d-js-tests into tests_js_3.0

Conflicts:
	tests/CocoStudioTest/GUITest/UIScene.js
issue #4221 cc.Director.getInstance()->cc.director
Merge pull request #353 from xingsenma/tests_js_3.0

Tests js 3.0