Editing Add a parallel authentication routine (section)

===The flow===

EPrints authentication Handler is called:

* Do we have a current eprints session cookie? (looks in ticket table)
** N - Bounce the user off to get authenticated.
*** user authenticates.
**** Set an eprints session cookie
**** Store an identifier on the "new" auth table
*** bounce user back to their original page
** Y - Can we get user from EPrints ticket table?
*** Y - Get user details, and log them in
*** N - Can we get details from the auth table?
**** N - Bounce user over to manual login pages
**** Y - Can we get a user based on identifier in auth table
***** N - Bounce user over to manual login pages
***** Y - Create record in ticket table
****** bounce user to their original page