Fixed null pointer exception when a boat finishes the race.

Boats now default to have position (0, 0).
Added mark rounding data to single player race.xml

racevisionGame/src/main/java/mock/app/Event.java

@@ -72,8 +72,6 @@ public class Event {
      */
     public Event(boolean singlePlayer) throws EventConstructionException {
 
-        singlePlayer = false;//TEMP
-
         String raceXMLFile = "mock/mockXML/raceTest.xml";
         String boatsXMLFile = "mock/mockXML/boatTest.xml";
         String regattaXMLFile = "mock/mockXML/regattaTest.xml";