Add XRDS file.
Update XRDS document and specs.
Remove unique index on users email.
Fix typo in OmniAuth callbacks controller.
Retrieve user by uid/provider, not email.
Clean up application.rb.
Add FICAM/PAPE compliant OpenID gems and update Devise initializer.
Clean up XRDS file.
Use url_for for XRDS links, clean up some meta tags.
Whoops.
Another update to the XRDS file.
Updates.
Redo XRDS with return_to assertions only.