Fuxed proble m with empty but not null config.rowsClass
User can add own tab into AdvancedVaadinDialog
Tabular can parse \t spaced column names
Fixed problem with AdvancedDialog.addTab if called before setContentRoot in dialog
DPUConfig dialog is set as active when created (ie. it should be created as the last one)
Major tabular update, added support for templates and basic column label generator