added group as container
added title/description as label/hint
moved buttons to buttonNode
added i18n
resolve all dependencies at once
added _FormMixin+_FormValueMixin
updated _getValueAttr to return booleans for checkboxes
added hintNode
added required/block classes
added removeSelected method
moved add button method
added addControl method to recreate row children from prototype+params
added removeRow method
override _getValueAttr to return array
added nls
updated default styles
updated tests