Fixed #3427: add some new tests to eventManagerTests
Merge branch 'tests_js_3.0' of https://github.com/cocos2d/cocos2d-js-tests into Iss3427_NewEventDispatcher
Merge pull request #352 from dingpinglv/Iss3427_NewEventDispatcher

Fixed #3427: add some new tests to eventManagerTests
Merge pull request #351 from SmallAiTT/tests_js_3.0_ccgame

Refactor cc.visibleRect by getter/setter.
Fix some bugs.