Adds gold to two reloading recipes.
Fix'd.
Apparently C:DDA's wordwrap function hates long names.
Changes honey's material type to 'null' and V8's material type to 'veggy'.

If milk is 'null' and eggs are 'null' why is honey 'veggy'. Also, why
isn't V8 'veggy'? That's all it's made from!
Also changes spoilage time on V8.

It shouldn't be spoiling any more than the cans of soda should be
spoiling.
Also fixes broth spoil time, for the same reason.
Spoilage timers restored.
Clear game.cpp of references to veh->external_parts.
Implement all_parts_with_feature, and remove an unused function declaration.

(Why wasn't that generating a compiler error?)
Use all_parts_with_feature in game.cpp.
Replace external_parts with all_parts_with_feature in lightmap.cpp.
Superglue fix.
Ammo types.
Adds chemical stuff to a few more spawn points.
Remove use of external_parts from npc.cpp.
Remove redundant check, and fix broken wheels not triggering traps.
Replace external_parts with all_parts_with_feature in map.cpp.
Add all_parts_at_location function to vehicle class, and use it in mapgen.cpp to replace external_parts.
Make vehicle::part_displayed_at safely return -1 if no part instead of segfaulting.
Remove uses of external_parts from veh_interact.cpp.