Merge pull request #1764 from dingpinglv/Iss4768_ReleaseV223

Issue 4768: add an assert to cc.Sprite for debug friendly
Merge pull request #1766 from dingpinglv/Iss4768_ReleaseV223

Issue #4768: update the version number
Issue #4768: update the CHANGELOG.txt
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss4768_ReleaseV223