Add subjects as a field in the advanced public search
Correct the 'creators' field search key in the FieldQuery schema
Add text_general solr fields for creators and subjects
Add migration to reindex all dependants of subjects and creators
Refactored Solr search to take a query object to encapsulate all options
Encapsulate term searches
Remove garbage 'opts' and rename search hooks
Merge pull request #669 from hudmol/allow-advanced-search-with-subjects

Allow advanced search with subjects