Issue #5245: Fix a bug that abnormal opacity
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop-5-22
Issue #5214: Fix cc._tmp cc is not define
Closed #5333:  CCBoot create new canvas no assignment method
Change the version number
Merge pull request #1875 from VisualSJ/develop-5-22

Some modifications are compatible