Sort namespaces

How did @eilon let this ship with the namespaces unsorted. He's growing soft in his old age. :trollface:

samples/HelloMvc/Startup.cs

@@ -1,5 +1,5 @@
-using Microsoft.AspNet.Routing;
 using Microsoft.AspNet.Builder;
+using Microsoft.AspNet.Routing;
 using Microsoft.Framework.DependencyInjection;
 
 namespace KWebStartup
@@ -20,4 +20,4 @@ namespace KWebStartup
             app.UseWelcomePage();
         }       
     }
-}
+}