Moves Attack, Armament, Move, Air traits and activities as well as anything required by them to Mods.Common.

Extracts Exit from Production into its own trait.

OpenRA.Mods.Common/Activities/Air/FlyCircle.cs

@@ -0,0 +1,33 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 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 OpenRA.Activities;
+using OpenRA.Mods.Common.Traits;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.Common.Activities
+{
+	public class FlyCircle : Activity
+	{
+		public override Activity Tick(Actor self)
+		{
+			if (IsCanceled)
+				return NextActivity;
+
+			var plane = self.Trait<Plane>();
+
+			// We can't possibly turn this fast
+			var desiredFacing = plane.Facing + 64;
+			Fly.FlyToward(self, plane, desiredFacing, plane.Info.CruiseAltitude);
+
+			return this;
+		}
+	}
+}