fixed #1615 remove some error checks for WebGL and modify font name for LabelTest
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js-tests into Iss1615_WebGLRendering
fixed #1615 correct a mistake for SceneTest
fixed #1615 correct a mistake for SceneTest
fixed #1615 add preload resource to tilemap list
Merge pull request #147 from dingpinglv/Iss1615_WebGLRendering

fixed #1615 remove some error checks for WebGL and modify font name for LabelTest