Closed #4856: fixed a bug of cc.TMXXMLParser and cc.TMXLayer getTileAt etc functions support a point or x,y as their parameters.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss4856_TMXLayer
Merge pull request #1804 from dingpinglv/Iss4856_TMXLayer

Closed #4856: fixed a bug of cc.TMXXMLParser and cc.TMXLayer getTileAt etc functions support a point or x,y as their parameters.