Added RaceStatusEncoder.

Refactored RaceStatusDecoder to be more consistent with other decoders - it now has a getMessage() function.
Added BoatStatus encoder and decoder - the RaceStatus encoder and decoder uses this for BoatStatuses. The BoatStatus encoder doesn't implement the MessageEncoder interface as BoatStatus is not a proper message type (doesn't inherit from AC35Data).
Added remaining cases to EncoderFactory, but commented them out.
BoatStatus now uses BoatStatusEnum instead of a byte.
Added some comments to RaceStatus, and it uses enums instead of bytes.
MockOutput logs a warning if a RaceStatus cannot be encoded.
Added a BoatStatusDecoderTest.
Updated RaceStatusDecoder to use new encoders/decoders.
issue #35 #36
#story[1095]

racevisionGame/src/main/java/visualiser/model/VisualiserRace.java

@@ -215,7 +215,7 @@ public class VisualiserRace extends Race implements Runnable {
 
 
             //Boat status.
-            BoatStatusEnum newBoatStatusEnum = BoatStatusEnum.fromByte(boatStatus.getBoatStatus());
+            BoatStatusEnum newBoatStatusEnum = boatStatus.getBoatStatus();
 
             //If we are changing from non-racing to racing, we need to initialise boat with their time at last mark.
             if ((boat.getStatus() != BoatStatusEnum.RACING) && (newBoatStatusEnum == BoatStatusEnum.RACING)) {
@@ -309,7 +309,7 @@ public class VisualiserRace extends Race implements Runnable {
     private void updateRaceStatus(RaceStatus raceStatus) {
 
         //Race status enum.
-        this.raceStatusEnum = RaceStatusEnum.fromByte(raceStatus.getRaceStatus());
+        this.raceStatusEnum = raceStatus.getRaceStatus();
 
         //Wind.
         this.setWind(