Aftermath support, and spinners (on MGG, MRJ, TTNK) work (again?).

OpenRa.Game/Traits/RenderUnitSpinner.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Game.Graphics;
+
+namespace OpenRa.Game.Traits
+{
+	class RenderUnitSpinner : RenderUnit
+	{
+		public Animation spinnerAnim;
+
+		public RenderUnitSpinner( Actor self )
+			: base(self)
+		{
+			spinnerAnim = new Animation( self.unitInfo.Name );
+			spinnerAnim.PlayRepeating( "spinner" );
+		}
+
+		public override IEnumerable<Tuple<Sprite, float2, int>> Render(Actor self)
+		{
+			var unit = self.traits.Get<Unit>();
+
+			yield return Util.Centered(self, anim.Image, self.CenterLocation);
+			yield return Util.Centered( self, spinnerAnim.Image, self.CenterLocation 
+				+ Util.GetTurretPosition(self, unit, self.unitInfo.PrimaryOffset, 0));
+		}
+
+		public override void Tick(Actor self)
+		{
+			base.Tick(self);
+			spinnerAnim.Tick();
+		}
+	}
+}