fetchart: Add last.fm source

[jallbrit]

Use case

When downloading album art via fetchart, it would be useful to be able to query last.fm. This functionality is present in airsonic, and I tried to find how it works and came across this commit which seems to implement this functionality.

Solution

The fetchart plugin should have a new source called lastfm or last.fm that queries last.fm.

Alternatives

For some releases, the sources currently available for album art don't suffice. Thus, the only suitable alternative is to grab the art manually.

[sampsyo]

Sounds good! Seems like it shouldn't be that complicated if someone wants to jump in.

[jackwilsdon]

I wouldn't mind picking this up - seems rather straighforward.