splitting traits into own files

OpenRa.Game/Traits/Building.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Game.Traits
+{
+	class Building : ITick
+	{
+		public Building(Actor self)
+		{
+		}
+
+		bool first = true;
+		public void Tick(Actor self, Game game, int dt)
+		{
+			if (first && self.Owner == game.LocalPlayer)
+			{
+				self.Owner.TechTree.Build(self.unitInfo.Name, true);
+				self.CenterLocation = 24 * (float2)self.Location + 0.5f * self.SelectedSize;
+			}
+			first = false;
+		}
+	}
+}