Fixes diazepam duration of effect.

Diazepam works for about six to eight hours. The current math has it
working for around one.
De-comment.
Merge pull request #7933 from Rivet-the-Zombie/diazepam-duration-fix

Fixes diazepam duration of effect.
Fixes the prices of arrows and quarrels.
Merge pull request #7936 from Rivet-the-Zombie/moar-pricez

Fixes the prices of arrows and quarrels.
Removed obsolete translations. French and German translations don't use any of special dialects. So fr.po and de.po will be used in any case.
German translation update
French translation update
Japanese translation update
Russian translation update
Chinese (Simplified) translation update
Chinese (Traditional) translation update
BUFFS!
Merge pull request #7938 from John-Candlebury/railguns

BUFFS! To H&K railguns
Prevents bullwhips from 'jamming' when 'fired'.

It's just as hacky as the original implementation of the weapon, but it
prevents it from misfiring when used.
Merge pull request #7937 from VlasovVitaly/update-translations

Translations update
Merge pull request #7941 from Rivet-the-Zombie/kinda-sorta-whip-fix

Prevents bullwhips from 'jamming' when 'fired'.