created updateStateful
live model for embedded attribute
added setNull/setEmpty to updateModelHandl
finished live model for embedded poly
finished live model for array
fixed adding poly obejcts to array
fixed resetting array
fixed date and primitive_list_select
added watch removals to Decorator and GroupMixin
added mergedObject to updatModelHandle
fixed oldValue setting in Editor. Added live model in CheckedMultiSelect
GRoupFactories need to implement collectAttributes
fixed group initialization
destroy children n widget list update
Merge remote-tracking branch 'origin/master' into feature/live_model

Conflicts:
	AttributeFactoryFinder.js
	embedded/SingleTypePanelWidget.js
	group/_DecoratorMixin.js
	group/_GroupMixin.js
	list_primitive/RepeatedAttributeWidget.js
	primitive/CheckedMultiSelectAttributeFactory.js
	primitive/SelectAttributeFactory.js
	tests/test_embedded.html
fixed mapped_select
fixed mapped multi select
added updateAny to updateModelHandle
fixed embedded
fixed embedded