Supply and scrubber pipes, APCs, and misc.

Removes random supply and scrubber pipes.
Properly connects the entire supply and scrubber piping network.
Adds missing APCs in the Engineering Monitoring Room and Mining station communications (technically belonging to most of the western wing). 
Removes excessive APC on the Research outpost.
Corrects positioning of two fire extinguisher cabinets + light switch and wrench additions.

Restores missing vent and scrubber in the arrival security checkpoint.

See individual commits for greater detail.