Fixed discovery bug, implemented server list, added server parameters

- Resolved DNS bug by updating to a newer version of JmDNS
- Added server list, this is populated with new servers as they are discovered
- Added map name and spaces remaining to server advertisement

Tags: #story[1247]

src/main/java/seng302/visualiser/GameClient.java

@@ -142,6 +142,7 @@ public class GameClient {
     }
 
     private void loadStartScreen() {
+
         socketThread.setSocketToClose();
         if (server != null) {
             server.terminate();