title: Pull to refresh like gmail new (4.5) application
body: <p>In the new gmail application (4.5) the refresh is done by "Pull-to-Refresh" action in the Actionbar:</p>
  
  <p><img src="https://i.stack.imgur.com/68sxV.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/hawfG.png" alt="enter image description here"></p>
  
  <p>Where can I find more information about that "Pull-to-Refresh"?</p>