Added connection screen to allow users to select available hosts from a preconfigured list.

- Added ConnectionController for initial client setup
- Added RaceConnection class for socket data and checking
- Configures StartController with a socket drawn from a host table

#story[782]

visualiser/src/main/java/seng302/RaceConnection.java

@@ -1,14 +1,53 @@
 package seng302;
 
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
+
+import java.io.IOException;
+import java.net.Socket;
+
 /**
  * Created by cbt24 on 3/05/17.
  */
 public class RaceConnection {
-    private String hostname;
+    private StringProperty hostname;
     private int port;
+    private StringProperty status;
 
     public RaceConnection(String hostname, int port) {
-        this.hostname = hostname;
+        this.hostname = new SimpleStringProperty(hostname);
         this.port = port;
+        this.status = new SimpleStringProperty("");
+        check();
+    }
+
+    /**
+     * Tries to create a socket to hostname and port, indicates status after test.
+     */
+    @SuppressWarnings("unused")
+    public boolean check() {
+        try(Socket s = new Socket(hostname.get(), port)) {
+            status.set("Ready");
+            return true;
+        } catch (IOException e) {}
+
+        status.set("Offline");
+        return false;
+    }
+
+    public String getHostname() {
+        return hostname.get();
+    }
+
+    public StringProperty hostnameProperty() {
+        return hostname;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public StringProperty statusProperty() {
+        return status;
     }
 }