Merge pull request #1 from tgstation/master

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MONINETEEN

-PORTS MOON OUTPOST 19 FROM NTSTATION
-PORTS RUSTED WALLS
Halfasseryed Updat

-Replaces resin doors with more resin walls
Decreases Changeling Scaling Coefficient to 6

The same value as Traitor.

Requested by @Aranclanos
Supply datums will now use initial() to get the name of the items in their contents, instead of creating and deleting the objects before roundstart.
Ignore everything in data folder
Added leading slash
Fixes the multiplication of air contents inside of the pipes when disconnecting and reconnecting sections.
Removes the unused pipenet datum proc removeLastMember() and replaced it with a pipe machinery proc, releaseAirToTurf(). This will release some gas contents to the turf properly when the pipe is removed.
Fixed the overeye hair, now it should display properly instead of an 'error' message.
Merge pull request #4752 from JStheguy/portaporty

Moon Outpost 19 Port
Merge pull request #4858 from Aranclanos/pipefixes

Pipenet hotfixes.
Merge pull request #4855 from Aranclanos/seriouslyitwasthisieasy

Supply datums roundstart mass-deletion fix.
Changelog for Maintenance Drones
Merge pull request #4875 from JJRcop/drones-changelog

Changelog for Maintenance Drones
Merge pull request #4866 from Aranclanos/overeye

Fixed the overeye hair, now it should display properly instead of an 'error' message.
Merge pull request #4856 from Donkie/gitignore

.gitignore update
Merge pull request #4852 from Ikarrus/lingmatchtraitor

Decreases Default Changeling Scaling Coefficient to 6