Move AttackWander into root Traits folder

It's not really an Attack* trait, so it doesn't belong into that subfolder.

OpenRA.Mods.Common/Traits/AttackWander.cs

@@ -0,0 +1,38 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2016 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, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Traits
+{
+	[Desc("Will AttackMove to a random location within MoveRadius when idle.",
+		"This conflicts with player orders and should only be added to animal creeps.")]
+	class AttackWanderInfo : WandersInfo, Requires<AttackMoveInfo>
+	{
+		public override object Create(ActorInitializer init) { return new AttackWander(init.Self, this); }
+	}
+
+	class AttackWander : Wanders
+	{
+		readonly AttackMove attackMove;
+
+		public AttackWander(Actor self, AttackWanderInfo info)
+			: base(self, info)
+		{
+			attackMove = self.TraitOrDefault<AttackMove>();
+		}
+
+		public override void DoAction(Actor self, CPos targetCell)
+		{
+			attackMove.ResolveOrder(self, new Order("AttackMove", self, false) { TargetLocation = targetCell });
+		}
+	}
+}