Roughing in Containers module

Container/containable editor templates appear
Container id settable via drop list
ContainerPathConstraint of higher priority providing list view

--HG--
branch : dev

src/Orchard.Web/Modules/Orchard.Lists/Migrations.cs

@@ -14,6 +14,7 @@ namespace Orchard.Lists {
                     .WithPart("CommonPart")
                     .WithPart("RoutePart")
                     .WithPart("ContainerPart")
+                    .WithPart("MenuPart")
                     .Creatable());
 
             //ContentDefinitionManager.AlterTypeDefinition("ListWidget",