LobbyView now can change to RaceView upon race start packet received.

Added port number text field in start screen controller.
Created a client state.

#story[1055] #pair[hyi25, zyt10]

src/main/java/seng302/client/ClientStateQueryingRunnable.java

@@ -0,0 +1,28 @@
+package seng302.client;
+
+import java.util.List;
+import java.util.Observable;
+
+/**
+ * Created by zyt10 on 21/07/17.
+ */
+public class ClientStateQueryingRunnable extends Observable implements Runnable {
+
+    private Boolean terminate = false;
+
+    public ClientStateQueryingRunnable() {}
+
+    @Override
+    public void run() {
+        while(!terminate) {
+            if (ClientState.isRaceStarted() && ClientState.isConnectedToHost()) {
+                setChanged();
+                notifyObservers();
+            }
+        }
+    }
+
+    public void terminate() {
+        terminate = true;
+    }
+}