title: Continuously synchronizing facebook friends
body: <p>In our application users can synchronize his friends based on facebook relationships. User hit "sync" button in application, we call "friends" in graph api, and receive all user that use our application and synchronize friends in our application. </p>
  
  <p>Is there a way to synchronize continuously his friends periodically, for example once a week, without user participation(no need to hit the button)?</p>