Allow to include alias in artist search query

[neutralino1]

I need queries such as "BRMC" to return the proper result, i.e. "Black Rebel Motorcycle Club". That is basically the default behaviour on the musicbrainz website. I also added support for MusicBrainz::Recording.find('id', inc: [artist_credits]) and then recording.full_artist_name which displays the full artist name (e.g. "Macklemore & Ryan Lewis feat. Ray Dalton", when the recordings' release is associated to "Macklemore & Ryan Lewis").