Last.fm scrobbling using composer
There was a discussion a few months ago about using composer tags in last.fm scrobbling. The patch did what I wanted it to, but after being checked in it was reverted when some people complained. Fair enough. I have got round to adding a config option for this behaviour.

Feedback in particular: I am new to amarok, so might be using the config system incorrectly. It does work though.

Behaviour implemented: when config option is set, scrobble composer preferentially to artist; when not set, always use artist data (default, and same behaviour as before)

Implements 254580
Courtesy: Nicholas Wilson