fixed a bug of cc.Sprite that it's wrong when call _changeTextureColor function
Merge pull request #1042 from dingpinglv/ContentScaleFactorNotEqual1

fixed a bug of cc.Sprite that it's wrong when call _changeTextureColor function
Merge pull request #1043 from linshun/iss2580_v2.1.5

Merged v2.1.5 to master branch