Three Dollar Quill

I've got enough of a stub for reporting to implement the helper code I currently want. (The code is missing nice stringification, and I don't want to handle that right now.)

With that done well enough for now, I tossed together cattrs-based deserialization for the sector data I generated previously.

I'm tired right now, but I think the next step is to work out image generation and potential route calculations. From there, I can work on figuring out how to represent actual routes in the data, and to deserialize that into some form of reasonable object. (NB self: I need to check whether having a working route in one direction automatically implies having a working route in the other direction.)

Anyway, that's enough for now.

Good night.