Added spawnpoint datum, moved existing latejoin spawn to datum setup.
Added latejoin landmarks to the map and modified the gateway annex to be all-access/more casual.
Minor formatting fix.
Removed pointless option on cryopod.
Ravensdale thinks the gateway has lore problems, commenting it out of spawn.
Merge branch 'spawnpoints' of https://github.com/Zuhayr/Baystation12 into dev
Changed cryo message a bit.
Merge pull request #5353 from Zuhayr/spawnpoints

Spawnpoints.
Pipe fixes

- Cleans up silent pipe deleting (now creates a loose pipe item where the pipe section was)
- Allows pipe painters to paint disconnected pipes
- Removes OOC message from IC feedback
Atmos Overhaul - Phase 1

- Implements omni device core framework
- Adds omni gas mixer
Added omni filters

- Added omni gas filter
- Cleaned up some code in mixer.dm and omni_base.dm