Recovered stable rotation of the player's boat

- Uses AnimationTimer rather than listeners
- Reduced pre-start time to speed up testing

#story[1261]

racevisionGame/src/main/java/shared/model/Constants.java

@@ -36,15 +36,15 @@ public class Constants {
     public static final int RaceTimeScale = 2;//10;
 
     /**
-     * The race pre-start time, in milliseconds. 3 minutes.
+     * The race pre-start time, in milliseconds. 3 minutes (30 seconds for development).
      */
-    public static final long RacePreStartTime = 3 * 60 * 1000;
+    public static final long RacePreStartTime = 30 * 1000;
 
 
     /**
      * The race preparatory time, in milliseconds. 1 minute.
      */
-    public static final long RacePreparatoryTime = 1 * 60 * 1000;
+    public static final long RacePreparatoryTime = 60 * 1000;