Switched server resources to Slim.ServiceManager.

Changed HttpRoutingHandler to use the general Slim.ServiceManager.
Changed WebsocketRoutingHandler to a similar approach as HttpRoutingHandler.
Implemented IRunOnStartup interface for handlers.

MTSC.UnitTests/RoutingModules/HelloWorldModule.cs

@@ -0,0 +1,24 @@
+using MTSC.Common.WebSockets.RoutingModules;
+
+namespace MTSC.UnitTests.RoutingModules
+{
+    public class HelloWorldModule : WebsocketRouteBase<HelloWorldMessage, HelloWorldMessage>
+    {
+        public override void ConnectionClosed()
+        {
+        }
+
+        public override void ConnectionInitialized()
+        {
+        }
+
+        public override void HandleReceivedMessage(HelloWorldMessage message)
+        {
+            this.SendMessage(message);
+        }
+
+        public override void Tick()
+        {
+        }
+    }
+}