Fix: artistinfo format changed (<bandmembers>), update parser accordingly
Force deleting invalid artist biographies, introduced by last.fm format change (<bandmembers>), and re-read all missing biographies
For starred, recently played and most played, return results for all users when username null is passed as parameter
Expose setting for limiting radio songs to a given length interval
Bumped to 0.7.19
Merge remote-tracking branch 'origin/master' into F2_VIDEO_FILE_BROWSING - 0.7.19