Map Enhancements - Chemistry, Engine, HoP's Office

-Added gas sensor to core and linked to the computer in the engine room,
with sensor modified to output gas composition as well as temperature
and pressure
-Removed air alarm from core area due to it causing an instant atmos
alert and sealing the area with fire doors
-Made the core doors start bolted to prevent accidental walking into the
core room (and releasing oxygen into/cold air out of the core)
-Added general security access requirement to security dormitory doors
-Added second chem dispenser to chemistry, and adjusted positions of
other objects in room to compensate for the shift in position of the
secondary station
-Replaced one grenade casing in chemistry with an igniter to properly
balance the components without leftovers
-Moved paper bin in Head of Personnel's office to be on table beside
front desk for convenience
-Removed Mining camera computer from the Head of Personnel's office to
reflect Cargo being an entirely separate department.