Let Widget class don't support cascaded opacity and cascaded color on default.
Merge pull request #7726 from CocosRobot/update_lua_bindings_1407720566

[AUTO]: updating luabinding automatically
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #7727 from CocosRobot/update_cocosfiles_1407720774

[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #7683 from andyque/fixWidgetDefaultCascadColorAndOpacity

Let Widget class don't support cascaded opacity and cascaded color on default.