split out Sellable into its own trait; yaml requires update

OpenRA.Mods.RA/Buildings/Sellable.cs

@@ -0,0 +1,45 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using OpenRA.Orders;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Buildings
+{
+	class SellableInfo : TraitInfo<Sellable> 
+	{
+		public readonly int RefundPercent = 50;
+	}
+	
+	class Sellable : IIssueOrder, IResolveOrder
+	{
+		public IEnumerable<IOrderTargeter> Orders 
+		{
+			get { yield return new PaletteOnlyOrderTargeter("Sell"); }
+		}
+		
+		public Order IssueOrder( Actor self, IOrderTargeter order, Target target, bool queued )
+		{
+			/* todo: make this work */
+			throw new NotImplementedException();
+		}
+		
+		public void ResolveOrder(Actor self, Order order)
+		{
+			if (order.OrderString == "Sell")
+			{
+				self.CancelActivity();
+				self.QueueActivity(new Sell());
+			}
+		}
+	}
+}