Lobby view will switch to race view when received race status packet with race start type.

Ready button can only be pressed by host. Once pressed, it will send out race status packet with race start to all clients.

#story[1055]

src/main/java/seng302/controllers/StartScreenController.java

@@ -72,14 +72,15 @@ public class StartScreenController {
             String ipAddress = InetAddress.getLocalHost().getHostAddress();
             // get the lobby controller so that we can pass the game server thread to it
             new GameState(getLocalHostIp());
-            new MainServerThread();
+            MainServerThread mainServerThread = new MainServerThread();
             ClientState.setHost(true);
             // host will connect and handshake to itself after setting up the server
             // TODO: 24/07/17 wmu16 - Make port number some static global type constant?
             ClientToServerThread clientToServerThread = new ClientToServerThread(ClientState.getHostIp(), 4942);
             ClientState.setConnectedToHost(true);
             controller.setClientToServerThread(clientToServerThread);
-            setContentPane("/views/LobbyView.fxml");
+            LobbyController lobbyController = (LobbyController) setContentPane("/views/LobbyView.fxml");
+            lobbyController.setMainServerThread(mainServerThread);
         } catch (Exception e) {
             Alert alert = new Alert(AlertType.ERROR);
             alert.setHeaderText("Cannot host");