title: Swift - UITableViewCell? is not convertible to UITableViewCell
body: <p>I'm new to Swift development and following many online tutorials. The majority of these Tutorials are referring to older versions on Xcode and the code is resulting in errors. Can anyone explain why the code below produces 'UITableViewCell?' is not convertible to UITableViewCella and how I go about fixing this problem. </p>
  
  <p>I am using Xcode 7.</p>
  
  <pre><code>override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -&gt; UITableViewCell {
  
      let cell = tableView.dequeueReusableCellWithIdentifier("customcell") as UITableViewCell
  
          cell.textLabel?.text = array[indexPath.item]
          return cell
  }
  </code></pre>