Made hardware stores with back lots more common
random vehicle part sizes are more consistent.

also parts are given a bit of damage sometimes :)
Fixing place_cities()'s notworkingness, for the most part.

Includes tweaks to make somewhat smaller cities, however now they're
not all clumped into one in a restricted section of the overmap.

This includes some of Oddzball's overmapgen tweaks, but it doesn't go as
far.
https://github.com/Oddzball/Cataclysm-CZS/compare/5da2505...c0ec9b18a93acef633f070ee9111e7d5ba1fada3
Making vehicles a bit more common.

justification: If players really want a vehicle in their initial small
town, it shouldn't be too hard to find one. They've been downgraded, and
probably half of them work now anyways.
(By design. Program-wise, they seem very stable now.)
Nerfed dinosaur spawns and skill gains.