Added Toggle Option to Use the MLAPI Relay

- Also cleaned up and merged title screen files into a single class

Assets/Scripts/UI/Title/MainMenu.cs

@@ -0,0 +1,23 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+public class MainMenu : MonoBehaviour {
+    
+    public void OnOptionsClicked() {
+        SceneManager.LoadScene("Options");
+    }
+
+    public void OnControlsClicked() {
+        SceneManager.LoadScene("Controls");
+    }
+
+    public void OnQuitClicked() {
+        Application.Quit();
+    }
+
+    public void OnCreditsClicked() {
+        SceneManager.LoadScene("Credits");
+    }
+}