fb_views.module users view

Issue Summary

I've been working extensively with your FB module recently and noticed what I believe are two fairly basic bugs:

line 46 of fb_views.module should read "users" not "user"

fb_views_handler_filter_friends.inc should on line 25 do something like:
$alias = $this->table_alias;
$this->query->add_where(0, $alias . '.fbu IN (%s)',
implode(',', $friends));

to support relationship handling in views.