Issue #3427: add mouse event to eventManager
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into Iss3427_NewEventDispatcher
Issue #3427: cc.eventManager supports mouse event
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into Iss3427_NewEventDispatcher
Issue #3427: remove unused code from cc.inputManager
Merge pull request #1595 from dingpinglv/Iss3427_NewEventDispatcher

Issue #3427: cc.eventManager supports mouse event