Changes names for some medieval armor things and tweaks weights a bit.

Compromise on names that don't require SCA history lessons to decipher,
plus a bit of extra internet research shows that the armor was indeed a
little on the heavy side.
Ornamental armor weight is now 18 kg.
Grammar alteration to make the soldering/low-batteries message more clear.
Survivor gear accessories: helmet, boots, and gloves!
Tweak.
Tweak.
Tweak.
Winter survivor suit!
Tweak.
Tweak.
Merge Launchpad Translations.
Tweak.
Tweak.
Fixes a text mixup in snippets.json!
Pull road-based vehicle spawning into a single function
Die, car chassis! You don't belong in this world.
Removes tungsten alloy from 5x50 dart's description.
Modify pgettext() to work with dynamically loaded strings.
Use gettext contexts for proper names.
Replaces knife tool segments with 'CUT' tag segment!