Progreso.pl (we are Polish web hosting company) - today launched full support for Let’s Encrypt in our control panel server (called Extranet). One click, 60 seconds and the site work in SSL version.
News about the implementation:
How to generate a certificate with one click:
https://pomoc.progreso.pl/baza_wiedzy/strony-www/ssl-https/#jak-wygenerowac-darmowy-certyfikat-lets-encrypt-w-extranecie
Thanks Let’s Encrypt!