#1136 Created demo widget invoker with controller action, view and view model.
#1036 Created demo controller action / model / view for view model, inherited from renderWidgetViewModel
#1090 Fixed deleting of draft page contents;
#1076 Fixed retrieving of child regions, when children are drafts
#1090  Fixed creation of child content / child regions projections: increased performance
#1146 Lucene: updated indexer start / stopping logic
Merge branch 'dev' into dev-1.9.0

Conflicts:
	Modules/BetterCMS.Module.LuceneSearch/Services/IndexerService/DefaultIndexerService.cs