move Building et al into Mods/

OpenRA.Mods.RA/Buildings/CustomSellValue.cs

@@ -0,0 +1,24 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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 LICENSE.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Buildings
+{
+	// allow a nonstandard sell/repair value to avoid
+	// buy-sell exploits like c&c's PROC.
+
+	public class CustomSellValueInfo : TraitInfo<CustomSellValue>
+	{
+		public readonly int Value = 0;
+	}
+
+	public class CustomSellValue { }
+}