Merge pull request #1136 from dingpinglv/Iss2803_V2.1.6Release

Issue #2803: correct some mistakes in AUTHORS.txt
Merge pull request #1137 from dingpinglv/Iss2803_V2.1.6Release

Issue #2803: Update authors of Cocos2d-html5
Issue #2803: update submodule reference