Map tweaks

Multiple bugfixes, adjustments to engineering, moved engineering pod, changed the training room to a portables storage room, changed the construction area to a training room, more bugfixes, fixed up a lot of pipes, fixed dozens of scrubbers/vents that were set off or set to the wrong type of vent, more fixes, fixed a crooked AI door, added a few airlocks that were lost with the medical change, more fixes, rearranged the engine room a bit, added a sing observation camera, more fixes.

Signed-off-by: Jamini <mobiousjami@gmail.com>
Merge pull request #3178 from Jamini/bleeding-edge-freeze

Map tweaks