Added button sounds on hover, click and in the lobby

- Started playing start & lobby sounds
 - Started playing button hover & click sounds

Tags: #story[1249]

src/main/java/seng302/visualiser/controllers/cells/PlayerCell.java

@@ -3,8 +3,10 @@ package seng302.visualiser.controllers.cells;
 import javafx.fxml.FXML;
 import javafx.scene.control.Label;
 import javafx.scene.effect.DropShadow;
+import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.GridPane;
 import javafx.scene.paint.Color;
+import seng302.utilities.Sounds;
 
 public class PlayerCell {
 
@@ -24,4 +26,8 @@ public class PlayerCell {
     public void initialize() {
         playerName.setText(name);
     }
+
+    public void playButtonHoverSound(MouseEvent mouseEvent) {
+        Sounds.playHoverSound();
+    }
 }