created new demo scene switcher

this is just an overhaul of the debug scene switcher -- no longer breaks if you leave the main menu! a win for the girlies

Assets/Scripts/SceneController.cs

@@ -50,4 +50,8 @@ public class SceneController : MonoBehaviour
         SceneManager.LoadScene(index);
     }
 
+    public void LoadSceneByName(string name) {
+        SceneManager.LoadScene(name);
+    }
+
 }