Fixed #599: fixed the bug that hexagonal tilemap on Canvas mode position is error
Merge branch 'v2.x' of https://github.com/cocos2d/cocos2d-html5 into Iss5800_StencilBug
Merge pull request #2088 from dingpinglv/Iss5800_StencilBug

Fixed #599: fixed the bug that hexagonal tilemap on Canvas mode position is error