WIP: Implementing space ninja gamemode
Updates
Secbelts now can hold melee weapons.
Phasing out world loops, pt 1
Space Ninja Gamemode Implementation
Merge branch 'bleeding-edge-freeze' of https://github.com/Baystation12/Baystation12 into bleeding-edge-freeze
Merge branch 'bleeding-edge-freeze' of https://github.com/Baystation12/Baystation12 into bleeding-edge-freeze
Stacks update.
Airlock construction update.
Quickfix and changelog.
ZAS fixes, implements multi-tile doors (That work perfectly!)
That multi-tile firedoor needs love.  Lots of love. (It is missing a lot of icon states)
Forgot the files, doh!
Typo fix.
Merge pull request #3150 from SkyMarshal/master

ZAS fixes, implements multi-tile doors (That work perfectly!)
Conflict fix. I hope.
Punctuation fix.
Merge pull request #3143 from Segrain/bleeding-edge-freeze

Construction update.
Merge branch 'bleeding-edge-freeze' of https://github.com/Baystation12/Baystation12 into bleeding-edge-freeze
Merge pull request #3153 from Zuhayr/feature

Ikky's holobadges, SkyMarshal's ZAS fix (merged with Segrain's airlock changes), robot language understanding.
Made changeling absorbing leave proper wounds and be aimable.

Signed-off-by: Furlucis <Logman115@gmail.com>