Kill'Em All

The first release of rattlehead, the cli tool to post metal releases to
Mastodon.

What it can do at the moment is:

* Authenticate to Mastodon instances by being provided application id
  and secret, together with a user authorization token.
* Fetch metal releases from Wikipedia and from MusicBrainz per year.
* Post to Mastodon a message containing the releases for a specific day,
  or week.

To see it in action give it a follow at @releasebot@metalhead.club