Move arbitrary property operator to PropOp.

Assets/Cryville/Crtr/PropOp.cs

@@ -8,6 +8,15 @@ using RBeatTime = Cryville.Crtr.BeatTime;
 namespace Cryville.Crtr {
 	public abstract class PropOp : PdtOperator {
 		internal PropOp() : base(1) { }
+		public class Arbitrary : PropOp {
+			public int Name { get; set; }
+			protected override void Execute() {
+				var op = GetOperand(0);
+				var value = new byte[op.Length];
+				op.CopyTo(value, 0);
+				ChartPlayer.etor.ContextCascadeUpdate(Name, new PropSrc.Arbitrary(op.Type, value));
+			}
+		}
 		public class Boolean : PropOp {
 			readonly Action<bool> _cb;
 			public Boolean(Action<bool> cb) { _cb = cb; }