title: Drawing a dashed line with fabric.js
body: <p>I'd like to draw a dashed line using fabric.js.
  <a href="https://github.com/kangax/fabric.js/issues/603">I've found Issue #603 on github that should implement this feature.</a>
  However I didn't find any example code and can't get it to work with fabric.js 1.2.1.</p>
  
  <p>Is it already part of fabric.js 1.2.1 or do I have to get it off github directly and build it myself? Could someone provide me with a simple example to get me started?</p>