-Removed leftover items from testing

-Removed all medicine and supplies related to fabrication of items
-Linked all big containers to all fabricators for ease of use
-Refinements related to the externally operated chaingun. It is now safer to use. Note that when the submarine crashes into walls or is hit by something big, the operator is in danger of being flung at sea
-Further refinement of airlock. Now water doesn't slam you around when it's rushing in.
-Minor optimisation

Small refinements

-Refining of last update

-Minor fixes

Added an externaly operated chaingun. It's located in front of the docking port and can be used on the move provided the user stays partially inside the docking port.

I've fixed/updated a lot of stuff and I forgot most of the details. Anyways, the sub is a bit better off now.