NPCs no longer enter moving vehicles
NPC checks path before attempting to leave vehicle
Added missing iuse_function_list value for Towels so they can actually be used.
Put a cap on the duration of smoke effect.

Losing the torso health bar 5x over fully because you spent a while in an underground cellar with fire, trying to wait for it to go out is ridiculous.
Fix issue #2000

Only go into the new item use case for boots, not for any item that has an iuse.
Merge towels, NPC vehicle interactions, cap smoke damage, and consumable accounting.
Cleanup missing brackets and NPC skullsplosions (TM Nickboom).
Rejigger towel effect to remove wet morale penalty instead of trying to counteract it. Spelling change.