0.8.1

Added

• Support vimeo links as input. Vimeo showcase and Vimeo player URLs can now be passed as downloadable URL.
  If the target is referer restricted, use the --referer command line option, passing the embedding page's URL.
  Closes #19.

Changed

• Store downloader and downloader_options in State rather than pulling them all the way through the call tree.

Full Changelog: v0.8.0...v0.8.1