adding lastfm cover
documentation of the cover endpoint
including local settings for password and local configuration
adding empty keys
correction and default keys
test the return keys
test for the status and the stats
register to a player change with a websocket
Merge pull request #6 from fixme-lausanne/cover

Fetch the cover from last.fm api
search and playlist manipulation
adding next and previous testing
complete test for playlist manipulation
adding elements to the playlist
adding flask socket
cannot test with the usual webserver anymore
updating the readme according to the new worker we use
little comment
playlist change too
newline at correct places
playlist info