Support inLanguage for releases and works in json-ld
Add producer markup to releases and recordings. Ensure that ISRCs are loaded in order to be shown on the release view for recordings.
MBS-8082: include gender in JSON webservice. Apparently we entirely missed this. Silly.
Merge branch 'json-ld-20141205' into beta

* json-ld-20141205:
  Add producer markup to releases and recordings. Ensure that ISRCs are loaded in order to be shown on the release view for recordings.
  Support inLanguage for releases and works in json-ld
Merge branch 'beta' of github.com:metabrainz/musicbrainz-server into beta