Merge pull request #205 from annando/master

fbpost/fbsync: fetching larger photos, appnet/statusnet/twitter: better removal of superfluous links
updating the tracking code generated by the Piwik addon
Merge pull request #206 from tobiasd/piwik20140811

updating the tracking code generated by the Piwik addon
Merge pull request #207 from annando/master

Encode the URLs with GUIDs
Merge pull request #208 from annando/master

Use of the new cache function, setting some addons in the "deprecated" status
Merge pull request #209 from annando/master

appnet, statusnet and twitter: Now a parent is provided in the notifications so threading of the mails will work.
Merge remote-tracking branch 'upstream/master'