Refactor more power and infiltration stuff. Create new power sabotage ability for spies in ra and ts.

OpenRA.Mods.RA/Power/ScalePowerWithHealth.cs

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+#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.Traits;
+
+namespace OpenRA.Mods.RA.Power
+{
+	[Desc("Scale power amount with the current health.")]
+	public class ScalePowerWithHealthInfo : ITraitInfo, Requires<PowerInfo>, Requires<HealthInfo>
+	{
+		public object Create(ActorInitializer init) { return new ScalePowerWithHealth(init.self); }
+	}
+
+	public class ScalePowerWithHealth : IPowerModifier, INotifyDamage
+	{
+		readonly Power power;
+		readonly Health health;
+
+		public ScalePowerWithHealth(Actor self)
+		{
+			power = self.Trait<Power>();
+			health = self.Trait<Health>();
+		}
+
+		public int GetPowerModifier()
+		{
+			return 100 * health.HP / health.MaxHP;
+		}
+
+		public void Damaged(Actor self, AttackInfo e)
+		{
+			power.PlayerPower.UpdateActor(self);
+		}
+	}
+}