Auto-Swing (#827)

* BurstLinq

make BGM resync when changing pitch (to test)

* autoswing

some game implementations, most games already work fine

* more game tweaks

* 16th note swing

more game fixes
make pitch change resync optional in the API

* suppress some common warnings

* Update Credits.txt

Assets/Scripts/EventCaller.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using BurstLinq;
 using System.Collections.Generic;
 using UnityEngine;
 using Jukebox;