* 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)
* let user decide whether to link headlines to original content or not

works around #74
some more de translations
* added some info texts and help links
added logout to instagram.class

also better login/logout for facebook.class
Merge remote-tracking branch 'upstream/master'
update FR translation