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.

Big changes to user data (cleaned up problem where too much was being stored there).  Fixes problem where bogus fbu in user data was screwing things up.  Also keeps the authmap table properly in sync, by forcing updates with every new session.  Hopefully these changes don't break too much.

set uid to NULL rather than 0 when uid is not known.

Change to authmap logic.  Set authmap more frequently, do avoid a tricky situation when the user object has an fbu, but the authmap has not been set.

support for site offline canvas page