Add handling of legacy data

- Handle legacy _id in couch module
- Handle legacy provider name in views
- Add script to create first ingestion document for legacy data and
  to update legacy documents with ingestion_version of 1
- Add legacy handling test and test data
- Add provider field to dashboard "record" documents
- Add view to query by provider name and ingestion version
Add script to update NARA links
Update view name in export_reports
Merge branch 'release-v3.1'