Use MakeAnimation for selling; Support selling non-buildings

OpenRA.Mods.RA/Activities/Sell.cs

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+#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.Collections.Generic;
+using OpenRA.Traits;
+using OpenRA.Mods.RA.Effects;
+using OpenRA.Traits.Activities;
+using OpenRA.Mods.RA.Buildings;
+		
+namespace OpenRA.Mods.RA.Activities
+{
+	class Sell : CancelableActivity
+	{
+		public override IActivity Tick(Actor self)
+		{
+			var h = self.TraitOrDefault<Health>();
+			var si = self.Info.Traits.Get<SellableInfo>();
+			var pr = self.Owner.PlayerActor.Trait<PlayerResources>();
+			var csv = self.Info.Traits.GetOrDefault<CustomSellValueInfo>();
+			
+			var cost = csv != null ? csv.Value : self.Info.Traits.Get<ValuedInfo>().Cost;
+			
+			var refund = (cost * si.RefundPercent * (h == null ? 1 : h.HP)) / (100 * (h == null ? 1 : h.MaxHP));			
+			pr.GiveCash(refund);
+			
+			foreach (var ns in self.TraitsImplementing<INotifySold>())
+				ns.Sold(self);
+
+            if (self.World.LocalPlayer != null && self.Owner.Stances[self.World.LocalPlayer] == Stance.Ally)
+                self.World.AddFrameEndTask(w => w.Add(new CashTick(refund, 30, 2, self.CenterLocation, self.Owner.ColorRamp.GetColor(0))));
+			
+			self.Destroy();
+			return this;
+		}
+
+		// Not actually cancellable
+		protected override bool OnCancel( Actor self ) { return false; }
+	}
+}