Add Chassis Dealers for player cities.

I like it, but I kind of want to make my own kiosk for it. Rather than the NPC being added to the city, I would like to create a terminal that you can drop the junk loot off at. This would save the player time from having to travel to an NPC city starport to find the NPC and make the trade, especially for those that use the "Direct-To-Home" space ITV when they land on the planet.