title: Animate UITableViewCell gives me error
body: <p>I have a <code>UITableView</code>. I want to add a <code>cell</code> to the beginning of the <code>tableView</code> with animation. I tried the following:</p>
  
  <pre><code>let indexPath = NSIndexPath(forRow: 0, inSection: 0)
  tableView.reloadRowsAtIndexPaths(indexPath, withRowAnimation: UITableViewRowAnimation.Automatic)
  </code></pre>
  
  <p>But I get the following error:</p>
  
  <blockquote>
    <p>Cannot invoke <code>'reloadRowsAtIndexPaths'</code> with an argument list of type
    <code>'(NSIndexPath!, withRowAnimation: UITableViewRowAnimation)'</code></p>
  </blockquote>
  
  <p>(When I just do <code>tableView.reloadData()</code> it works fine.)</p>
  
  <p>What am I doing wrong, and how can I fix it?</p>