Merge pull request #128 from danito/master

update FR translation
added basic filtering to twitter.class

done differently than i proposed in #127.
* gets a list of all active mods (minus twitter itself)
* filter tweets that have a source that contains the name of an active
mod
* i suspect the modNameList() function in reclaim.php to be written
poorly. it might be a performance hog or cause other problems that i
don't understand. i jope some one who knows what he/she is doing can
have a look on that
error fixes for yelp.class

* better review-id pasing
* transform relative and redirected yelp links to absolute links
* use shortened description if getting a long description fails
* fixes #129 (i hope)
fixes a problem that prevented auto import of favs

also sets reclaim_instagram_last_update instead of only setting
reclaim_instagram_posts_last_update and
reclaim_instagram_favs_last_update
small corrections, deleted some logging

* twitter.class now again saves last_seen_id
* facebook filtering in a separate function
added tumblr.class

* not finished yet: it imports only the primary blog yet
* secondary blogs are shown on the settings screen, but can and should
not be activated (yet)
* extended hybridauth_helper.php to get the full profile (which also
lists all users blogs)

todo:
* import secondyry blogs
* check if tumblr post are published and not set private
make sure all mods save _reclaim_post_type (posts | favs | share)

* also added twitpic mod
* a hack for (twitpic) image importing with a wrong header
* added short_title() function to mod.class
* small corrections to tumblr.class (see #130)
* small corrections to twitter.class
check if mod returned an empty var

isset didn't get it, empty does. my mistake :(