Blacklists a lot of iconless things and base classes
Fixes a pretty critical infinite loop with cargo spawning that was crashing the server
Moves posters out of the signs spawn and into their own, spawns them properly in the item form.
Removes disease analyser from scanners
Reduces weights on various weapons and traitor items
Some other minor tweaks to weights
This PR is intended to make working in cargo more interesting, and more like a real warehouse experience. IE, the place is an aladdin's cave full of wierd knicknaks and useful oddifies.
