Merge remote-tracking branch 'upstream/master'
Facebook: First changes to make the connector maybe work with the second version of the Facebook API
Twitter/Facebook: New functions for expiring of imported posts from twitter and facebook.
App.net: New connector that will be expanded to a bidirectional connector in the future.
Merge remote-tracking branch 'upstream/master'
Removing blanks with tabs
Appnet: Bidirectional sync with app.net
Merge pull request #199 from annando/master

app.net/expire of facebook and twitter posts