add support for converting data by parent type of target type
add a pseudo css selector [:root] for referencing rendering target
bugfix: the pseudo root selector is conflicting with skipping faked group logic
bugfix: ElementUtil#removeNodesBySelector should not remove the given target element even it was matched to the given selector
bug fix: type transforming for array should create the array as given target type rather than convertor's type
bugfix: about pseudo root selector
radio has worked and checkbox is on working