I had accidentally broken the raceXML construction - fixed it.

Fixed a few issues where boat didn't have nextMark/previousMark times under certain circumstances.
LatestMessages wasn't actually notifying properly - fixed.
The various XML readers now treat a string constructor as containing file contents, not file name - this was how it was mostly already used.
Fixed some issues in RaceXMLReader, including where element.getChildNodes() was used instead of element.getElementsByName(...).
Boat: changes speed to a doubleProperty. Changed leg to a Property<Leg>.
Race.lastFps is now an IntegerProperty.
Added breaks to the case statements in VisualiserInput. Whoops.
ResizableRaceCanvas now handles drawing the race boundary. Tidied up code a bit.
Removed ResizableRaceMap.

Started refactoring Sparkline. Currently doesn't work.

racevisionGame/src/main/java/network/Messages/LatestMessages.java

@@ -140,7 +140,7 @@ public class LatestMessages extends Observable {
      * @param markRounding The MarkRounding message to set.
      */
     public void setMarkRounding(MarkRounding markRounding) {
-        //TODO should compare the sequence number of the new boatLocation with the existing boatLocation for this boat (if it exists), and use the newer one.
+        //TODO should compare the sequence number of the new markRounding with the existing boatLocation for this boat (if it exists), and use the newer one.
         markRoundingMap.put(markRounding.getSourceID(), markRounding);
     }
 
@@ -221,6 +221,7 @@ public class LatestMessages extends Observable {
     public void setRaceXMLMessage(XMLMessage raceXMLMessage) {
         this.raceXMLMessage = raceXMLMessage;
 
+        this.setChanged();
         this.notifyObservers();
     }
 
@@ -240,6 +241,7 @@ public class LatestMessages extends Observable {
     public void setBoatXMLMessage(XMLMessage boatXMLMessage) {
         this.boatXMLMessage = boatXMLMessage;
 
+        this.setChanged();
         this.notifyObservers();
     }
 
@@ -259,6 +261,7 @@ public class LatestMessages extends Observable {
     public void setRegattaXMLMessage(XMLMessage regattaXMLMessage) {
         this.regattaXMLMessage = regattaXMLMessage;
 
+        this.setChanged();
         this.notifyObservers();
     }