Merge pull request #1305 from dingpinglv/Iss3344_TilemapLine

Closed #3344: fixed TMXLayer's bug that it has thin lines at tile's border when EGLView's scale doesn't equal 1.
Closed #3344: remove the test codes.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3344_TilemapLine