added factorygirl and some factories
use self.table_name, not set_table_name
Delete Sector and PersonSector models, along with IndustryStats module.

As far as I can tell, these are not in use. Trying to access these associations in production gives SQL errors.
more rails 4 refactoring for queries
more rails 4 refactoring
Merge branch 'beta' of github.com:sunlightlabs/opencongress into beta