Backfill subpackage
Fix BRIDGE-278
Merge pull request #343 from eric-wu/develop

Fix Travis test failures
Remove whitespace
Merge pull request #344 from alxdarksage/studies

Mostly validation changes; disabling multi-threading for schedule generation
Backfill study certificates
Merge pull request #345 from eric-wu/develop

Backfill study certificates
Moving to request-time construction of schedule lists for users