title: Cyrillic symbols in URL
body: <p>App crashes with following url:    </p>
  
  <pre><code>let jsonUrl = "http://api.com/алматы/events"
  let session = NSURLSession.sharedSession()
  let shotsUrl = NSURL(string: jsonUrl)
  let task = session.dataTaskWithURL(shotsUrl!)
  </code></pre>
  
  <p>Log:</p>
  
  <pre><code>fatal error: unexpectedly found nil while unwrapping an Optional value
  </code></pre>
  
  <p>It's because of cyrillic symbols in url. How can I solve this issue. Thanks for your help!</p>