Add telescience blocks on the mining Z-level

[Mofleaker]

I think it would be neat if the debris field were semi-randomly generated on a grid. For example you might have the listening post in the bottom right on one round, the top left in another, and in a different round it doesn't even spawn at all.

I'd also love to see ye olde space adventure locations make a comeback by being added into the mix. Let's go exploring dilapidated Zeta and the russian zombie station!