added BuildableInfo

OpenRa.Game/Traits/Buildable.cs

@@ -5,6 +5,18 @@ using System.Text;
 
 namespace OpenRa.Game.Traits
 {
+	class BuildableInfo : ITraitInfo
+	{
+		public readonly int TechLevel = -1;
+		public readonly string Tab = null;
+		public readonly string[] Prerequisites = { };
+		public readonly Race[] Owner = { };
+		public readonly int Cost = 0;
+		public readonly string Description = "";
+		public readonly string LongDesc = "";
+		public object Create(Actor self) { return new Buildable(self); }
+	}
+
 	class Buildable
 	{
 		public Buildable( Actor self ) { }