Added single target HalveAggro and DoubleAggro

Both exported to perl/lua
pass the target you wish to change their hate.
Fix NPC rampage to be more in-line with live

New rules:
RuleI: Combat, DefaultRampageTargets
	Set to 1
	If the specatk db entry has no extra param it will use this
RuleB: Combat, RampageHitsTargets
	Defaults to false
	If true, if number hit is still less than RampageTargets, try tank

If you want the old behavior still set DefaultRampageTargets to 3 and
RampageHitsTargets to true