Fixed bug in edan_to_dapl and lookup modules.
Added dc_data_provider dictionary to akara.conf.
Move language regex creation to iso639_3 module

- Create LANGUAGE_NAME_REGEXES in iso639_3 module and import in
  scripts/poll_profiles
- Add cleanup, enrich, and lookup language to Harvard profile
- Create language transform in oai_mods_to_dpla
Fixed missing title in edan_to_dpla.
Cleared empty values in DC profile.
Merge branch 'develop' of github.com:dpla/ingestion into develop
Merge branch 'develop' into internet_archive