Add a prepper house with a gunsmithing garage
Actually add new prepper house (and remove incorrect traps from other house)
Change landmine to buried landmine

I was going to create a separate trap for this, but it seems unnecessary.
Increase crafting time of some survivor weapons.

They were ridiculously low.
12 gauge pistol, mininuke launcher, ferromagnetic rifle, pneumatic
rifle/bolt driver.
Merge pull request #10598 from jokermatt999/traphouse

Add a prepper house with a gunsmithing garage (CR)
Merge branch 'craft-time' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into time
Recategorize paper leg guards, thanks to Rhodri for reporting.