Certbot version 0.8.0 has been released.
The main new feature in this release is the `register` subcommand which
can be used to register an account with the Let's Encrypt CA.
Additionally, you can run `certbot register --update-registration` to
change the e-mail address associated with your registration.
More information about the changes in this release can be found at:
https://github.com/certbot/certbot/issues?q=is%3Aissue+milestone%3A0.8.0+