added a shutdown api method, font size fix and other decouplings

MediaBrowser.Networking/WebSocket/AlchemyServer.cs

@@ -42,6 +42,12 @@ namespace MediaBrowser.Networking.WebSocket
             _logger = logger;
         }
 
+        /// <summary>
+        /// Gets the port.
+        /// </summary>
+        /// <value>The port.</value>
+        public int Port { get; private set; }
+
         /// <summary>
         /// Starts the specified port number.
         /// </summary>
@@ -56,6 +62,8 @@ namespace MediaBrowser.Networking.WebSocket
 
             WebSocketServer.Start();
 
+            Port = portNumber;
+
             _logger.Info("Alchemy Web Socket Server started");
         }