Fix deserialization of notes from rhys file

Scripts/BangerTypes/Note.cs

@@ -5,6 +5,7 @@ using UnityEngine;
 
 namespace BangerTypes 
 {
+    [Serializable]
     public class Note
     {
         public float t; // Time

Scripts/BangerTypes/Rhys.cs

@@ -5,6 +5,7 @@ using UnityEngine;
 
 namespace BangerTypes
 {
+    [Serializable]
     public class Rhys
     {
         public Note[] notes;