Improved pathfinding

Tweaked a couple of lights, increased price from 7000 to 9000.

Moved the heavy hardpoint slightly closer to the hull.

Updated front hardpoint to a heavy one; slightly adjusted some wires.

Improved pathfinding; fixed engine wall being difficult to repair; added a platform section in the lower docking hatch (above the airlock), making it easier to repair the pump in the hatch.

Fixed mistake with airlock upload.

Lowered platform at the top hatch, easing repair; slightly improved pathfinding; fixed texture layering in the top left outside area; slightly moved the bow hardpoint preventing railguns from showing empty space.

Tweaked description again.

Reworked description.

Added Submarine tag.