title: Facebook javascript users_getInfo getting email
body: <p>How can I get the email address of a user from my app?</p>
  
  <p>Right now I have it as </p>
  
  <pre><code>FB.Facebook.apiClient.users_getInfo(uid, 'last_name, first_name, email_hashes', userInfoCallback);
  </code></pre>
  
  <p>The <code>last_name</code> and <code>first_name</code> does work, but <code>email_hashes</code> gives an empty Object.</p>
  
  <p>Am I missing anything?</p>
  
  <p>Thanks,
  Tee</p>