fixes cracks in the render of .tmx maps #198
fixes cracks in the render of .tmx maps #198

GL_CLAMP_EDGE for tmx tiles textures
patch and analysis contributed by  2slow2handle@gmail.com

shujunqiao/cocos2d-python,shujunqiao/cocos2d-python,vyscond/cocos,shujunqiao/cocos2d-python,dangillet/cocos