Added fb_user_get_local_friends().  This function returns the local uids of users who are also friends of the current user.  Currently working only for the current user, on canvas pages.

Initial support for AHAH in forms in FBML.  Using FBJS and an abstraction layer similar to that used in the ahah_forms module.

Fixed a permission problem when session first starts for an existing user.  Use a redirect to refresh the page, so Drupal knows the proper user from the start of the request.

Now, you can create a role manually.  Users who add the app will be given the role automatically.

#275432 by sushilmasti, fix for the invite form.  This fixes a syntax error in the previous checkin.

Added a sanity check to session management.  Relevant when a user adds an iframe app, then removes it.

Added a helper function using regexps to clean up links in profile fbml.

Also some bug fixes.

Added a helper function to cache user info in session, avoiding some inefficient queries to facebook servers.

Added a facebook user id column to the fb_user_app table.  This duplicates information in the authmap table, but is more efficient to query this way.

improved fb_get_friends to try to log in as the user who's friends are being enquired about.  This makes it more reliable on non-canvas pages, but still may not function properly (ie if the user has not established an infinite session).

This is experimental code because it may confuse users and administrators to see facebook names where they would otherwise see drupal username.

Also tweaked inline form descriptions.