removed editor -> ra dep; added EditorAppearance for inconvenient bits that the editor must have _some_ understanding of, but can't see

OpenRA.Game/Traits/EditorAppearance.cs

@@ -0,0 +1,19 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2010 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 LICENSE.
+ */
+#endregion
+
+namespace OpenRA.Traits
+{
+	public class EditorAppearanceInfo : TraitInfo<EditorAppearance>
+	{
+		public readonly bool RelativeToTopLeft = false;
+	}
+
+	public class EditorAppearance { }
+}