Changed the Template prop of documentrequest to be a new TemplateLookup object since we are going

to need to support MVC and the old Template object is for webforms. I've added a lot of TODO's here
because we'll need to enable the lookups properly in each ILookup and also set the rendering engine (IsMvc)
in the ILookups too. This hasn't been enabled, yet, just a bunch of TODO's written.

src/Umbraco.Web/UmbracoModule.cs

@@ -126,8 +126,8 @@ namespace Umbraco.Web
 					}
 
 					//TODO: Detect MVC vs WebForms
-					
-					var isMvc = true;
+					docreq.IsMvc = true; //TODO: This needs to be set in the ILookups based on the template
+					var isMvc = docreq.IsMvc;
 					RewriteToUmbracoHandler(HttpContext.Current, uri.Query, isMvc);
 				}
 			}