Readme Typos

[bousqi]

I just upgraded to last version, and I noticed typos in the readme file, dependencies section :

DependEncies: python3-requests and python3-zeroconf You can use this command to install them: apt-get install python3-requests python3-zeroconf

[bousqi]

Apparently "-c C" has been removed.

[skimpax]

I also saw the python3 typo, which I fixed in previous version. Here now in 2.1.1, I put back the -c option which now specify a directory (not the file) as there are several files in 2.X. Fixed in 2.1.1