Add constraints to ensure the right domains are picked for some rels
Adding autoselect + validation for IMDb samples stuff
Ensure the right level of SecondHandSongs is used
MBS-6269, Output track identifiers in XML output.
Merge branch 'master' into mbs-6269

* master:
  We require postgresl 9.1.
  MBS-6295, move use Test::JSON line up.
  MBS-6295, Track identifier related changes in relationship editor.
  MBS-6293, Update /ws/1/ track lookup by puid for track identifier changes.
  MBS-6271, construct correct /cdtoc/set_durations url.
MBS-6269, Output track identifiers in JSON output.
MBS-6334, MB.Control.ReleaseDisc.getReleaseArtist() return the format expected by MB.Control.ArtistCredit.render().
Standardising the way release events are shown
Add some info to meta for releases
Adding meta to labels and works
Add more info to work and release
Add begin/end area
MBS-6347: allow loading the parent country of an area
MBS-6347: show parent country in the area header
MBS-6347: display in subheader instead
MBS-6347: display parent country in inline search
MBS-6347: load parent countries for inline search, in order to display them
Add area to wikidata and wikipedia autoselect
Merge branch 'beta' of https://bitbucket.org/metabrainz/musicbrainz-server into mbs-6203
Expanding this for wikipedia/areas