[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #7665 from dabingnn/v3_addNewAttribFlag

V3 add new attrib flag
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #7667 from CocosRobot/update_cocosfiles_1407227920

[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #7664 from CocosRobot/update_cocosfiles_1407217954

[AUTO][ci skip]: updating cocos2dx_files.json
fix spellings
missing file guide
Create missing tools?.txt
Merge pull request #7670 from Wu-Hao/v3

fix readme spellings, added missing files guide for git user