#979502 by a_c_m, Dave Cohen: session save handler patch.  Also, avoid unsetting registered user role.

sanity check to avoid infinite refresh

funcky redirect on logout only when needed.
experimental feature to grant role at runtime.

by aangel, Dave Cohen: moved fb_user_app table, which tracks users who have authorized apps, to its own module.

#870010 by aangel, Dave Cohen: mechanism to manually link accounts, if fb_user.module is not configured to do so autmoatically.

by aangel, Dave Cohen: stop using authmap table, use new table fb_user instead, for mapping local accounts to facebook ids.

feature #612412 by aangel, Dave Cohen: optionally store user names in human-friendly format.  Also fixes to account create logic.

removed obsolete (fbml-specific) code from fb_canvas.module.  Improved documentation and eliminated php notices.

Expand fieldsets by default when creating new application.

use drupal_goto after user changes.

Moved creation of user accounts and authmaps.  Now performed in page footer, so that we can check for 404 and 403 errors (and skip in those cases).
Hopefully made this complex code somewhat simpler.  Could probably be better.

framework for passing javascript events between fb.js and modules.  New hook_fb op for javascript events.

Moved user form alters out of fb_connect and into fb_user.module.

minor text changes.

numerous changes, especially to session management and url rewriting. performance improvements and code simplification.