Moved XML message creation to RaceServer instead of ConnectionAcceptor.

RaceServer does not currently generate new XMLMessages - NYI.
Added a sequence number to RaceDataSource - this is used to indicate that the data source has been modified.
#story[1188]

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

@@ -71,8 +71,10 @@ public class FinishController extends Controller {
 
 
         //Winner label.
-        raceWinnerLabel.setText("Winner: "+ boatNameColumn.getCellObservableValue(0).getValue());
-        raceWinnerLabel.setWrapText(true);
+        if (boats.size() > 0) {
+            raceWinnerLabel.setText("Winner: " + boatNameColumn.getCellObservableValue(0).getValue());
+            raceWinnerLabel.setWrapText(true);
+        }
 
     }