* also count favs and if no count is available, say so
also count favs and differentiate between fav and post count

* made a class selector for ajax count buttons
* solves #112
* some tabs to spaces
* added ajax_resync_items() to facebook.class

* count value set to 40 for ajax_resync_items()
* and added a friendfeed filter
* added count for favs in instagram.class

* more accurate counting after ajax sync
* localised date
* added fav count to twitter.class
* better, more generic type naming

using 4 types now: posts, favs, shares (and activities for youtube favs
import)
* added ajax_resync_items() to youtube

also
* favs and activities count
* seems to be a confusing setup (posts, favs, activity), but ajax sync
can only loop through one API endpoint at a time. so we have 3 separate
ajax calls, but still only one regular force resync for autoupdates
* more generic type naming (posts instead of videos)