fix project setup
cleanup
Clean up layout / switch back to default look

* Clean up some layout xmls
* switch back to default ligth themes depending on android version
* show "unlink contact" only if it is matched
Use AsyncTask and inner ProgressDialog

Remove global Dialog
sync a single friend
Option: Sync profile picture

Add SettingsActivity and option to sync profile picture, not a larger one
Launch FriendList automatically

Launch FriendList automatically, if fb session is valid