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/mock/model/RaceServer.java

@@ -139,13 +139,14 @@ public class RaceServer {
 
         //Create race status object, and send it.
         RaceStatus raceStatus = new RaceStatus(
+                RaceStatus.currentMessageVersionNumber,
                 System.currentTimeMillis(),
                 race.getRaceId(),
-                race.getRaceStatusEnum().getValue(),
+                race.getRaceStatusEnum(),
                 race.getRaceClock().getStartingTimeMilli(),
                 windDirectionInt,
                 windSpeedInt,
-                race.getRaceType().getValue(),
+                race.getRaceType(),
                 boatStatuses);
 
         this.latestMessages.setRaceStatus(raceStatus);