Minor style fix in InfoSystem.
Removed no longer used variables and related methods from Collection.
Differentiate between local and Hatchet UserPlaylists.
Don't let the user delete/edit Hatchet Playlists.
"local" with a capital "L" ... duuuhhh
Persist Hatchet playlists in App's sqlite db. Improved db methods.
Fixes in LoginDialog. Fixed progress and status indicator.
Few comment corrections in LoginDialog.
Show proper edittext hint in LoginDialog. E-Mail for Spotify, Username for Hatchet.
Fixed "isAuthenticating" state in SpotifyAuthenticatorUtils.
Delete all Hatchet playlists, which are no longer present on server.
Final cleanup and minor fixes.