Adds 5 new colored lab coats

5 new colored labcoats: green, blue, red, orange, purple.

Credits to Nienhaus:
http://baystation12.net/forums/viewtopic.php?f=44&t=9984
 Attempt to restore vents, scrubbers and pipes around central.
Restores lost vents and scrubbers around central hallway and broken pipes, caused by previous merge.

Expands central hallway area where necessary to ensure that, for example, air alarms in the captain's office won't lower emergency shutters in the hallway.
Sorts some odd lone emergency shutters in the brig.
More overwritten pipe-changes detected. Central area, r-wall move.
Misc. Research had a weird old tile, causing yet another pipe-disconnect.
Merge pull request #4939 from PsiOmegaDelta/AllOverAgain

Map merge fixes + more
Merge pull request #4914 from Jarcolr/ColoredLabcoats

Adds 5 new colored lab coats
Merge branch 'dev' of https://github.com/Zuhayr/Baystation12 into dev
Cherrypicking vox spike throwers, made crossbows and pneumatic cannons constructable.