Issue #3541: add Sprite tests for NPM testing
Merge branch 'NPM' of https://github.com/cocos2d/cocos2d-html5 into Iss3541_TestingNPM
Issue #3541: correct a mistake for TextureColorCacheIssue.js
Merge pull request #1405 from dingpinglv/Iss3541_TestingNPM

Issue #3541: add Sprite tests for NPM testing