Layout detecting, stability improvements for tile window managers and so on

[seletskiy]

It'l be huge.

Overview of features introduced by this PR available here: https://github.com/seletskiy/screenkey#whats-up

I rewrote several blocks of code so I'm not 100% sure it will work on every configuration.

Please let me know what do you think.

[seletskiy]

@scs3jb: hey, how are you?

screenkey is really great tool and many people made changes to it after I've created my fork. Can you by any chance revamp your original repository?

[scs3jb]

Hi, will take a look! This was also a quick and nasty for a web capture I needed to do, you've put a lot of work into cleaning this up.

[scs3jb]

I was just looking at merging this since its a long time since I used this, and updating some dependencies when I saw a version that's more modern: https://gitlab.com/screenkey/screenkey , might be worthwhile using that as a future base.