Add game speed dropdown to the lobby.

OpenRA.Game/GameSpeed.cs

@@ -0,0 +1,40 @@
+#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 System.Collections.Generic;
+using System.Linq;
+using OpenRA.Graphics;
+
+namespace OpenRA
+{
+	public class GameSpeed
+	{
+		[Translate]
+		public readonly string Name = "Default";
+		public readonly int Timestep = 40;
+		public readonly int OrderLatency = 3;
+	}
+
+	public class GameSpeeds : IGlobalModData
+	{
+		[FieldLoader.LoadUsing("LoadSpeeds")]
+		public readonly Dictionary<string, GameSpeed> Speeds;
+
+		static object LoadSpeeds(MiniYaml y)
+		{
+			var ret = new Dictionary<string, GameSpeed>();
+			foreach (var node in y.Nodes)
+				ret.Add(node.Key, FieldLoader.Load<GameSpeed>(node.Value));
+
+			return ret;
+		}
+	}
+}