upgrade to django 1.6
use persistent database connections
Signage: Renamed 'sculpture-screen' back to 'sculpture'
Added book titles importer
Added subtitle field to ResearchItem
Renamed sub_title to subtitle in book titles importer
Fixed indentation issues in book titles importer
Merge branch 'feature/django1.6' into develop
Added ResearchItem.subtitle to indexed_fields
Merge branch 'develop' of github.com:torchbox/verdant-rca into develop