Merge pull request #1843 from N3X15/melting

Slag - More fixins.
Fix master belt not having a sprite
Wo
I am dumb 2: electric boogaloo
Fix head reattachment for realsies
Changelog
Real index fix this time I swear.
Fix merge conflicts.
Fix falsewall smoothing.
Captain can be converted by the cult so long as he does not have a loyalty implant.
Merge pull request #1849 from ComicIronic/Craftlathe

Real index fix.
Merge pull request #1738 from ComicIronic/Spacepods

Spacepods Overhaul #2 - Son of Spacepods
Changelog
Research outpost airlock upgrade

Upgraded research outpost airlock so that it would stop blowing supplies
and personnel into space.  Added airlock controls and sensors as well as
an even distribution of 2-way air vents to prevent air imbalances.
Revert "Research outpost airlock upgrade"

This reverts commit a53d64440c17858df5b8b460a936a2c41fcfa97a.
Research Outpost Airlock Update

Upgraded research outpost airlock into full airlock with air cycling
system to pressurize and depressurize the chamber, leading to fewer
accidents and far less equipment losses due to explosive decompression
in more extreme ZAS settings.
Merge pull request #1850 from N3X15/falsewall-fix

Fix falsewall smoothing.
Merge pull request #1853 from AnonymouxRex/Bleeding-Edge

Research outpost airlock upgrade
Fix merge conflicts, add map changes, minor other fixes.
Fix map