Add play source to last.fm plugin

[dmptrluke]

1:55 PM <jflory7> Ooh, Luke, you know what would be cool? If it also told you where they were listening from, e.g. Spotify, iTunes, etc. I think that's in their API, come to think of it.

[edwardslabs]

It doesn't look like the play source is available using the user.getRecentTracks method.

http://www.last.fm/api/show/user.getRecentTracks