Added WithFacingSpriteBody trait.

Extracted AutoSelectionSize into its own trait.

RenderUnit -> RenderSprites + WithFacingSpriteBody upgrade rule

Remove RenderSimple dependencies of ThrowsParticle
and WithHarvestAnimation.

OpenRA.Mods.Common/Traits/Render/AutoSelectionSize.cs

@@ -0,0 +1,31 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2015 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 COPYING.
+ */
+#endregion
+
+using System;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	public class AutoSelectionSizeInfo : ITraitInfo, Requires<RenderSpritesInfo>
+	{
+		public object Create(ActorInitializer init) { return new AutoSelectionSize(this); }
+	}
+
+	public class AutoSelectionSize : IAutoSelectionSize
+	{
+		public AutoSelectionSize(AutoSelectionSizeInfo info) { }
+
+		public int2 SelectionSize(Actor self)
+		{
+			var rs = self.Trait<RenderSprites>();
+			return rs.AutoSelectionSize(self);
+		}
+	}
+}