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.

Restored support for FBML popup dialogs.  Had been broken since 2.x->3.x upgrade.  Now using new FB.ui(...) javascript to support this.

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.

minor tweaks.

Introducing "controls" as a way to customize behavior on certain pages and the ajax callbacks those pages generate.