Hurties

Implemented some of these ideas
http://baystation12.net/forums/viewtopic.php?f=5&t=11043&p=235535#p235498

Missing limbs are not processed, their wounds disappear, germ levels are reset.
One big wound is spawned on parent organ instead. Size of wound depends on destroyed organ.
Limbs cannot be burned off, only brute damage triggers dismemberment.
Limbs don't really get destroyed, they just tear off.