title: Swift: NSData(contentsOfURL) crashing on XCode 6.1
body: <p>Before upgrading to XCode6.1 I was using the method NSData.dataWithContents() and it was working perfectly all the images were downloading. Today I have updated to XCode 6.1 and it forces me to use the function like this:</p>
  
  <pre><code>NSData(contentsOfURL: NSURL(string: completeUrl)!)!
  </code></pre>
  
  <p>and when I run the application it crashes on it with message:</p>
  
  <blockquote>
    <p>fatal error: unexpectedly found nil while unwrapping an Optional value</p>
  </blockquote>
  
  <p>I have tried many things but nothing works. I am looking for any simple alternative for this to download images from a given URL.</p>