Highlight call signs in WSJT-X which are currently spotted doing POTA.

This is currently a messy proof of concept, but it will eventually be expanded into something more robust. At the time of writing, it hasn't even been thoroughly tested simply because I couldn't receive any parks when I wanted to do the first real world test.

This guide assumes that you are using WSJT-X with multicast configured and enabled. There are plenty of guides floating about on how to set this up, so I will leave this bit as an exercise for the reader.

This guide also assumes basic familiarity with the terminal. If you're expecting a cushy user interface, I'm afraid you will have to wait until I've had the time and gumption to flesh this thing out a bit. Pull requests are welcome as always.

First, copy docs/settings.ini.example to settings.ini and modify it as needed. Then, run potassium/__init__.py from the project's root directory. When a spotted call sign shows up as the caller on WSJT-X, this program will a) output the call sign on the console, b) highlight the call sign in WSJT-X in a fetching blue/yellow combination.

The list of spotted POTA activators is updated every 60 seconds, which seems to be on par with the expected API load. Please don't decrease this cooldown time.