v3.1.0 (2017-06-08)

Feature release.

• Include the artists of each album in the search results. (PR: #118)

• Respect spotify/timeout setting when loading data from Spotify. (#129, PR:
  #139)

• Use OAuth to authenticate Spotify Web API requests, which has required
  authentication since 2017-05-29. The new config value spotify/client_id and
  spotify/client_secret must be set. Refer to the README for details. (#130,
  #142, PR: #143)