create a list of entities that we saw explode... in this case "saw" means questor was executing its ProcessState on that frame... Ill need to add a few more calls so this runs every single frame.
Check for targets that have exploded (but still exist as entities) every frame.

incidentally this will also enable us to track bounty payouts and to better statistics if we add on to this a bit.
we also ought to be able to track what killed the entity, guns, drones or both (we cant know what killed it, we can know what was attacking it when it exploded)
Merge branch 'BleedingEdge' of git://github.com/ISeeDEDPpl/Questor into BleedingEdge