Drags death sounds out of RenderInfantry into a separate DeathSounds trait.

Play death sounds with a new PlayVoiceLocal so they don't use full volume regardless of position relative to camera.
Adds option for alternative burn and zap death sounds.
Renames RenderInfantry's UseInfantryDeath trait to SpawnsCorpse.

Removes hack from ra desert shellmap.

OpenRA.Mods.RA/DeathSounds.cs

@@ -0,0 +1,53 @@
+#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 System.Linq;
+using OpenRA.Mods.RA.Move;
+using OpenRA.Primitives;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA
+{
+	public class DeathSoundsInfo : ITraitInfo
+	{
+		public readonly string DeathVoice = "Die";
+		public readonly string Burned = null;
+		public readonly string Zapped = null;
+
+		public object Create(ActorInitializer init) { return new DeathSounds(this); }
+	}
+
+	public class DeathSounds : INotifyKilled
+	{
+		DeathSoundsInfo info;
+
+		public DeathSounds(DeathSoundsInfo info) { this.info = info; }
+
+		public void Killed(Actor self, AttackInfo e)
+		{
+			// Killed by some non-standard means
+			if (e.Warhead == null)
+				return;
+
+			var cp = self.CenterPosition;
+
+			// Killed by fire
+			if (info.Burned != null && e.Warhead.InfDeath == 5)
+				Sound.Play(info.Burned, cp);
+
+			// Killed by Tesla/Laser zap
+			if (info.Zapped != null && e.Warhead.InfDeath == 6)
+				Sound.Play(info.Zapped, cp);
+
+			if ((e.Warhead.InfDeath < 5) || (info.Burned == null && info.Zapped == null))
+				Sound.PlayVoiceLocal(info.DeathVoice, self, self.Owner.Country.Race, cp);
+		}
+	}
+}