Updates atmo_control.dm to use absolute paths
Adds injector flow rate control to console

Adds injector flow rate control to large_tank_control console.
Adds engine core atmos control

Expands on the earlier engine pump fix to add proper control over the
engine core atmos. Adds core control computer that can set output
external pressure bound instead of output pressure, and special high
power vent pump type for the engine core.
Updates double vent pump flowrate
Merge pull request #6220 from mwerezak/gas-entropy

Engine Atmos Control Console