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.
I kind of feel like the type of the wound should depend on the damage that destroyed it somehow. Like if the limb was burned off, the player would get a large burn wound instead of a cut. 

I'm not sure what's the best way to decide that though, as the limb could have both types of damage, or it could have mostly one type of damage but then be removed by taking the other type of damage.