title: Swift convert NSError to String
body: <p>Is there a way to convert an error of type NSError in swift to a string?</p>
  
  <p>For example for something like this:</p>
  
  <pre><code>do {
      try response.status(.OK).send(fileName: "html/index.html")
  } catch {
      response.status(.FAIL).send(error.CONVERT_TO_STRING)
  }
  </code></pre>
  
  <p>.send() expects a string by default.</p>