Pull request for Spotify plugin development, see: https://groups.google.com/forum/#!topic/beets-users/2xsOZC-NMNk
Merge branch 'master' of https://github.com/sampsyo/beets into spotify-plugin
Complete PEP8 cleanup of spotify plugin
Change spottily plugin output to use syserr for everything except printing the plugin tracks.  Allows output to be piped.
Merge pull request #892 from olinbg/spotify-plugin

Pull request for Spotify plugin development
Spotify (#892): Simplify interface

This changes the flag from --show_failures to --show-failures, which is more
standard among Unixy CLIs. It also reduces some space and line noise in the
output.
Docs refinements and changelog for Spotify (#892)