Merge branch 'develop' into feature/dragAndDrop

* develop: (24 commits)
  Allow chained assignment to non-existent children
  Add MDLDynamicTableExample to ilustrate how add/remove items to MDL Table - Currently only adding is working. The rest job will be done as part of FLEX-35354
  Forgot header
  Returns parameter passed into setAttribute and setChild to enable chained assignment of values.
  Added missing pieces for TextBlock management Fixed bug in GroupElement.replaceElements()
  Added helper function
  FLEX-35354 - Rename TabsItemRendererFactoryForArrayListData  to TabsDynamicItemsRendererFactoryForArrayListData - Update TabsDynamicItemsRendererFactoryForArrayListData with new implementation of DynamicItemsRendererFactoryForArrayListData - Update example MDLDynamicTabsExample
  FLEX-35354 - Add DynamicItemsRendererFactoryForArrayListData to allow add items dynamically to MDL Table - Bead can be used in other components - Update TabsItemRendererFactoryForArrayListData with new DynamicItemsRendererFactoryForArrayListData
  Switch MDLDynamicTabsExample to JSFlex only build in Maven
  “Stringables” should be assignable to XML
  Partially fixed FormatExample
  Fixed a few errors in DataGridXcompile
  Fixed TLFEditTestFlexJS manual test
  Added maven build for UnitTests
  -refactored ant builds of manual tests to be closer to examples, and support for 'maven_compat' from test level ant scripts. -renamed GenericTests to UnitTests and fixed some display issues due to layout changes etc
  Quick fix for FormExample (avoid 0 width, 0 height clipping)
  Quick fix for ListsTest
  Quick fix for ImageTest
  FLEX-35350 - THead and TBody need to be created a bit early cause MDL complaining with NPE when dataProvider is null
  quick fix to get compiling and something displaying
  ...