title: prawn - import image from URL
body: <p>I can't seem to figure out how to import an image from an url</p>
  
  <p>To import the images from my localhost I use:</p>
  
  <pre><code>image"./assets/images/img.png"
  </code></pre>
  
  <p>When I replace the path with an URL it says </p>
  
  <pre><code>`image' : URL not found
  </code></pre>
  
  <p>Is there a solution for this, or should I create a def that downloads the image and to use the path it returns?</p>