No configuration GUI yet, you have to add a [Scrobbling] section to your jukrc,
with a Username=foo and Password=bar field to make it work.

Doesn't use liblastfm, because liblastfm doesn't support the latest last.fm API.

FEATURE:
CCBUG:262194


svn path=/trunk/KDE/kdemultimedia/juk/; revision=1281560