Remove HttpsEnforcer
Adjust route to clone, so we can use AuthorizedAction with it
Add new "Ownership" enum, for DocumentSetUser.role
Remove a ModelJsonConverters method, for less code, better maintainability
Add a toSeq to facilitate an API change
Simplify sharing JS and be more consistent with i18n strings
Change from PostgresqlEnum to Ownership enum, The Squeryl Way.

Fixes critical auth problems. Fixes #436