title: Keep UIWebView playing music while App is in background
body: <p>I think everything is in the title.</p>
  
  <p>I have a UIWebiew that plays music, and when the user use the power or home button, putting the app in background, I want the music to keep playing.</p>
  
  <p>Is it possible ?</p>
  
  <p>Thank you for your help !</p>