Add default facings to lua

OpenRA.Mods.Common/OpenRA.Mods.Common.csproj

@@ -177,6 +177,7 @@
     <Compile Include="Orders\UnitOrderTargeter.cs" />
     <Compile Include="Pathfinder\CellInfo.cs" />
     <Compile Include="PlayerExtensions.cs" />
+    <Compile Include="Scripting\Global\FacingGlobal.cs" />
     <Compile Include="Scripting\Global\HSLColorGlobal.cs" />
     <Compile Include="Scripting\Global\UserInterfaceGlobal.cs" />
     <Compile Include="ServerTraits\ColorValidator.cs" />

OpenRA.Mods.Common/Scripting/Global/FacingGlobal.cs

@@ -0,0 +1,30 @@
+#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 OpenRA.Scripting;
+
+namespace OpenRA.Mods.Common.Scripting.Global
+{
+	[ScriptGlobal("Facing")]
+	public class FacingGlobal : ScriptGlobal
+	{
+		public FacingGlobal(ScriptContext context)
+			: base(context) { }
+
+		public int North { get { return 0; } }
+		public int NorthWest { get { return 32; } }
+		public int West { get { return 64; } }
+		public int SouthWest { get { return 96; } }
+		public int South { get { return 128; } }
+		public int SouthEast { get { return 160; } }
+		public int East { get { return 192; } }
+		public int NorthEast { get { return 224; } }
+	}
+}