Allow Animation to generate its own Renderables.

OpenRA.Game/Graphics/Animation.cs

@@ -9,6 +9,7 @@
 #endregion
 
 using System;
+using System.Collections.Generic;
 
 namespace OpenRA.Graphics
 {
@@ -44,6 +45,16 @@ namespace OpenRA.Graphics
 			}
 		}
 
+		public IEnumerable<IRenderable> Render(WPos pos, int zOffset, PaletteReference palette, float scale)
+		{
+			yield return new SpriteRenderable(Image, pos, zOffset, palette, scale);
+		}
+
+		public IEnumerable<IRenderable> Render(WPos pos, PaletteReference palette)
+		{
+			return Render(pos, 0, palette, 1f);
+		}
+
 		public void Play(string sequenceName)
 		{
 			PlayThen(sequenceName, null);