title: Facebook iOS SDK and swift: how get user's profile picture
body: <p>i have integrated Facebook sdk in Xcode 6 (with swift).
  During the login i request the public_profile permission:</p>
  
  <pre><code>FBSession.openActiveSessionWithReadPermissions(["public_profile"], allowLoginUI: true, completionHandler: {
  ...
  ...
  </code></pre>
  
  <p>So i request the user's information:</p>
  
  <pre><code>FBRequestConnection.startForMeWithCompletionHandler { (connection, user, error) -&gt; Void in
  ...
  ...
  </code></pre>
  
  <p>Why the user object doesn't contain the profile picture? How can i get the user profile picture? It's not part of the public_profile?</p>
  
  <p>I get the following information:</p>
  
  <pre><code>2015-01-25 01:25:18.858 Test[767:23804] {
  "first_name" = xxx;
  gender = xxx;
  id = xxxxxxxxx;
  "last_name" = xxxxxx;
  link = "https://www.facebook.com/app_scoped_user_id/xxxxxxxxx/";
  locale = "xxxxx";
  name = "xxxxxxx xxxxxxx";
  timezone = 1;
  "updated_time" = "2013-12-21T18:45:29+0000";
  verified = 1;
  }
  </code></pre>
  
  <p>P.S: xxx for privacy</p>