reworked Mark function to handle Clear function, fixed Goal class to adjusted address format, added shufflecellsfunction

Gameplay/Contacts/ShuffleCells.cs

@@ -0,0 +1,7 @@
+public partial class ShuffleCells : Contact
+{
+    public override void CallAction()
+    {
+        _player.ShuffleCells();
+    }
+}