title: Failing to open active session after updating Facebook SDK to 3.5
body: <p>After updating the Facebook sdk to 3.5, when trying to perform openActiveSessionWithReadPermissions the operation fails. Here is the snippet for opening the session and handling the callback:</p>
  
  <pre><code>[FBSession openActiveSessionWithReadPermissions:@[@"email", @"user_hometown", @"user_location", @"user_birthday"]
                                     allowLoginUI:YES
                                completionHandler:
   ^(FBSession *session,
     FBSessionState state, NSError *error) {
       switch (state) {
           case FBSessionStateCreatedTokenLoaded:
           case FBSessionStateOpenTokenExtended:
           case FBSessionStateOpen:
           {
               completion(TRUE);
               break;
           }
           case FBSessionStateClosed:
           case FBSessionStateClosedLoginFailed:
               completion(FALSE);
               [FBSession.activeSession closeAndClearTokenInformation];
               break;
           default:
               break;
       }
   }];
  </code></pre>
  
  <p>I end up in the FBSessionStateClosedLoginFailed case and I get a FBSKLog as follows:</p>
  
  <pre><code>FBSDKLog: Cannot use the Facebook app or Safari to authorize, fb123456789012345 is not registered as a URL Scheme
  </code></pre>