Synchronised GUI with VisualiserInput thread.

- Made StreamedCourse extend Observable
- Initialised StartController after data pulled from network
- Moved VisualiserInput to visualiser module
- Deleted Networking subpackage from visualiser module

#story[782]

mock/src/test/java/seng302/Model/RaceTest.java

@@ -5,7 +5,6 @@ import javafx.scene.paint.Color;
 import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;
-import seng302.GPSCoordinate;
 import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.xml.sax.SAXException;