Added sounds to coin pick up

Refactored check for token collision to move into the generic check for collision method
Created a YachtEventType enum to differentiate between collision and pickup on client side.
Client now plays a sound when they pick up a token

#story[1250]

src/main/java/seng302/visualiser/GameClient.java

@@ -460,6 +460,7 @@ public class GameClient {
         );
     }
 
+    // TODO: 11/09/17 wmu16 - Add in functionality to viually indicate a pickup to a user
     private void showPickUp() {
         Sounds.playTokenPickupSound();
     }