album-tools v0.2.1

Changes for v0.2.1

* Beets integration:
    - Will cleanly exit if Beet DB is not set up. Visit:
      https://beets.readthedocs.io/en/stable/guides/main.html#configuring
      to see your options.

* File/album art downloads:
    - Fixed path issues so downloads will be saved to the current
      selected album directory, or to your `music_root` if you
      are not in an album directory.

* Dropping into a shell:
    - Choosing the menu option "sh" to open a shell now defaults to
      a `screen` session with "Album Tools" in the footer title. If
      `screen` is not installed, you are still dropped into your
      shell of choice with out `screen`.
      NOTE: for the footer to show up you'll need a global `screenrc`
      file in place or your own `~/.screenrc` file with 'hardstatus'
      configured. (Some penguin distros lack a default.) An example
      has been included in the release.