Create list of tests needed

hey @yarikoptic ! I've done just about all the changes / updates that I think are good for this first version, so please have it it / unlease the Yarik! Now is the right time to start review and tell me all the things I did wrong :) In all seriousness I always can quickly put together a first go, but then lots of tweaking / fine tuning / testing is needed. Actually, we don't technically have proper python tests, so if you want to make a list of tests to write I can go from there!