Add new medical items to spawn lists, fix some typos in descriptions
Clean up medical iuse, extract common bandage/first aid logic
There's code to print the new HP totals? Well, let's use it!
Only print new HP totals if the body part is damaged
Add an iuse for disinfectant
Fix misfire message for turrets (turrets now considered "NPC"s, rather than "player"s)
Show driving skill again in the '@' screen

Closes #1343.
Merge medical item integration and small fixes.