README.md: improve grammar, structure and add crux install instructions.

[lwilletts]

Hopefully this will help, I've tried to keep as much as the original readme as possible while cleaning up grammar and the like seeing as (correct me if I'm wrong) you're not a native english speaker.

[Nanoseb]

Thanks a lot!

[Nanoseb]

Just a question, why did you change '#' into '$'?
Isn't # the usual symbol for a root command and $ for a non root one?

[lwilletts]

I don't think I've ever seen that distinction before... It might just be simpler to preface commands that need root with sudo, as that'd be more understood on a glance.

[Nanoseb]

I have added 'sudo' when needed, but because I don't know crux I haven't edited this section, anyway I am not sure people using this distro need this kind of indication.

[lwilletts]

No they certainly do not :D

[Nanoseb]

python-psutil is now needed, you may need to update your crux repo

[lwilletts]

What new weird and wonderful features have you added? ;)

[Nanoseb]

Something to check if telegram-cli is running and the port available see #7, I thought this lib was by default with python core but it seems it is not. I really don't like adding dependencies when it is not needed, so when I will have more time I will probably look for something else, but still it is the most clever way to check that.

EDIT: I didn't notice that you were the one who reported the issue #7 ;)