revamp of damage notifs; added Explodes

OpenRa.Game/Traits/Explodes.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using OpenRa.Game.Effects;
+
+namespace OpenRa.Game.Traits
+{
+	class Explodes : INotifyDamage
+	{
+		public Explodes(Actor self) {}
+
+		public void Damaged(Actor self, AttackInfo e)
+		{
+			if (self.IsDead)
+			{
+				Game.world.AddFrameEndTask(
+					w => w.Add(new Bullet("UnitExplode", e.Attacker.Owner, e.Attacker,
+						self.CenterLocation.ToInt2(), self.CenterLocation.ToInt2())));
+			}
+		}
+	}
+}