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/resources/views/StartScreenView.fxml

@@ -20,9 +20,7 @@
    <children>
       <GridPane fx:id="startScreen2" layoutX="365.0" layoutY="285.0" nodeOrientation="LEFT_TO_RIGHT" prefWidth="800.0" style="-fx-background-color: #2C2c36;">
          <children>
-            <Label alignment="CENTER" text="Party Parrots at Sea" textFill="WHITE"
-              GridPane.columnSpan="2147483647" GridPane.halignment="CENTER" GridPane.rowIndex="1"
-              GridPane.valignment="BOTTOM">
+            <Label alignment="CENTER" text="Party Parrots at Sea" textFill="WHITE" GridPane.columnSpan="2147483647" GridPane.halignment="CENTER" GridPane.rowIndex="1" GridPane.valignment="BOTTOM">
                <font>
                   <Font size="40.0" />
                </font>
@@ -51,6 +49,27 @@
                   <Insets left="5.0" right="5.0" />
                </GridPane.margin>
             </TextField>
+            <GridPane GridPane.columnSpan="2" GridPane.rowIndex="5">
+              <columnConstraints>
+                <ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
+                <ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
+              </columnConstraints>
+              <rowConstraints>
+                <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
+              </rowConstraints>
+               <children>
+                  <ToggleButton fx:id="muteMusicButton" mnemonicParsing="false" onAction="#toggleMusic" prefWidth="130.0" text="Mute Music" GridPane.halignment="RIGHT">
+                     <GridPane.margin>
+                        <Insets left="5.0" right="5.0" />
+                     </GridPane.margin>
+                  </ToggleButton>
+                  <ToggleButton fx:id="muteSoundsButton" mnemonicParsing="false" onAction="#toggleSounds" prefWidth="130.0" text="Mute Sounds" GridPane.columnIndex="1">
+                     <GridPane.margin>
+                        <Insets left="5.0" right="5.0" />
+                     </GridPane.margin>
+                  </ToggleButton>
+               </children>
+            </GridPane>
          </children>
          <columnConstraints>
             <ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="442.0" />