Allow necromancers to reclaim corpses used

[Ziya]

For the necromancy system, corpses are currently one-use only. If a necromancer casts animate dead on a skeletal warrior's corpse (the item), and raise a skeletal warrior, if the necromancer unsummons it, there is a reset, if it is killed, etc., the corpse item is gone forever.

I propose that it be reclaimable but only by talking to it (much like how a necromancer upgrades it). This prevents a necromancer from reclaiming the corpse if the animated undead dies in battle or is in combat. This turns it into an out-of-combat reclaimable system, and becomes useful in situations where a necromancer had just animated an undead from a corpse but a reset is coming in 30 minutes.