Added most sound functionality.

There is not background music and sound effects (button clicking, ocean noises, crashes for collisions). Can mute the sound and the music independently of each other from the main menu.

#story[1249]

src/main/java/seng302/model/RaceState.java

@@ -15,6 +15,7 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import seng302.model.stream.parser.RaceStartData;
 import seng302.model.stream.parser.RaceStatusData;
+import seng302.utilities.Sounds;
 
 /**
  * Class for storing race data that does not relate to specific vessels or marks such as time or wind.
@@ -34,6 +35,7 @@ public class RaceState {
     private long serverSystemTime;
     private long expectedStartTime;
     private boolean isRaceStarted = false;
+    private boolean gunFired = false;
     long timeTillStart;
     private ObservableList<ClientYacht> playerPositions;
     private List<ClientYacht> collisions = new ArrayList<>();
@@ -64,6 +66,10 @@ public class RaceState {
         if (raceTime < 0) {
             return "-" + DATE_TIME_FORMAT.format(-1 * (raceTime - 1000));
         } else {
+            if (!gunFired) {
+                gunFired = true;
+                Sounds.playCapGunSound();
+            }
             return DATE_TIME_FORMAT.format(serverSystemTime - expectedStartTime);
         }
     }