Wrote possible fix for issue #50 (Composite command tries to remove non-existent element)

racevisionGame/src/main/java/visualiser/Controllers/RaceController.java

@@ -246,6 +246,11 @@ public class RaceController extends Controller {
                 }
             };
             trackBoat.start();
+
+            System.out.println(boat.getCurrentLeg().getEndCompoundMark().toString());
+            boat.legProperty().addListener((o, prev, curr) -> {
+                System.out.println(curr.getEndCompoundMark().toString());
+            });
         }
         // Fix initial bird's-eye position
         view3D.updatePivot(new Translate(250, 0, 210));