Added sound to rocket firing

Projekte/battleship/model/src/main/java/pp/battleship/game/client/AnimatonState.java

@@ -22,6 +22,7 @@ public class AnimatonState extends ClientState {
     public AnimatonState(ClientGameLogic logic, boolean myTurn, IntPoint position) {
         super(logic);
         logic.playMusic(Music.BATTLE_THEME);
+        logic.playSound(Sound.ROCKET_FIRED);
         this.myTurn = myTurn;
         if(myTurn) {
             logic.getOpponentMap().add(new Shell(position));

Projekte/battleship/model/src/main/java/pp/battleship/notification/Sound.java

@@ -22,5 +22,9 @@ public enum Sound {
     /**
      * Sound of a ship being destroyed.
      */
-    DESTROYED_SHIP
+    DESTROYED_SHIP,
+    /**
+     * Sound of a rocket
+     */
+    ROCKET_FIRED
 }