issue #4174 add some getter method .
issue #4174 add read "selectedState"
issue #4174 fix scale bug for button.
issue #4174 fix layoutParameter clone bug.
issue #4174 refactor addNode and addChild for widget
issue #4174 fixed frame event emit twice times
issue #4174 add removeByComponent for ComponentContainer
Merge pull request #1617 from xingsenma/develop

issue #4174 support cocostudio v1.3.0