Introduced area-based routes

In OnTopic 5, we introduced improved support for area routing (66c53c9) with the new `MapImplicitAreaControllerRoute()` (8a65c95, f41b76a), `MapDefaultAreaControllerRoute()` (35cdd74), and `MapTopicAreaRoute()` (6c6ad74, 762d229). These were never added to the default configuration for the `Host` project, however. Strictly speaking, they aren't necessary since the `Host` project doesn't have any areas configured. Most customers will, however, so it's useful to include these as part of the configuration to demonstrate their use and make them available for boilerplate projects.

Author: JeremyCaney

OnTopic.AspNetCore.Mvc.Host/Program.cs

@@ -67,7 +67,9 @@
 /*------------------------------------------------------------------------------------------------------------------------------
 | Configure: MVC
 \-----------------------------------------------------------------------------------------------------------------------------*/
-app.MapTopicErrors("Error");                           // Error/{statusCode}
+app.MapImplicitAreaControllerRoute();                           // {area:exists}/{action=Index}
+app.MapDefaultAreaControllerRoute();                            // {area:exists}/{controller}/{action=Index}/{id?}
+app.MapTopicAreaRoute();                                        // {area:exists}/{**path}
 app.MapDefaultControllerRoute();                                // {controller=Home}/{action=Index}/{id?}
 app.MapTopicRoute("Web");                              // Web/{**path}
 app.MapTopicRoute("Error");                            // Error/{**path}