WebSearch: affil/collab indexes and SPIRES syntax
WebSearch: affil/collab indexes and SPIRES syntax

* Added affiliation and collaboration indexes.

* SPIRES query syntax parser updated for INSPIRE indexes and fields.
  Added several new translations.

tiborsimko/invenio-records,tiborsimko/invenio-search,tiborsimko/invenio-records,tiborsimko/invenio-search,inveniosoftware/invenio-search,inveniosoftware/invenio-records,inveniosoftware/invenio-records,inveniosoftware/invenio-search