Add support for generation of CheckedMultiSelect elements with values
depending on a mapped attribute.
Remove console.log statements. Add missing initialization check to mapped
multi select factory.
Initialize the old value on multi select elements to an empty array for
correct change detection. Add "checked" property to single selects for
choosing between Select and CheckedMultiSelect.
Add generation of ContentPane mapped to a given attribute and loading its
content from a defined url.
Fix initialization bug for NULL value in an embedded field group.
Add factory for generating TimeTextBox elements.
fixed resetting array
Fix initialization bug in SingleTypePanelWidget for embedded types. Add
support for generating currency amount fields.
fixed date and primitive_list_select
added watch removals to Decorator and GroupMixin
added mergedObject to updatModelHandle
Remove watch handles on destroy() method calls in DecoratorMixin and
GroupMixin. Delete unused SingleValueValidationMixin. Remove some
console.log statements that were only added for testing purposes.
Remove "checked" property from SelectAttribute and add a
CheckedSelectAttributeFactory that can be addressed via
editor=checked_select.
Refactor the different select attribute factories in order to reduce
duplicated code.
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