title: Create Guides and Grids ruler with fabric.js
body: <p>Is there a way to create Guides and grids ruler with fabric.js like photoshop?
  I know a library for this purpose: 
  <a href="http://mark-rolich.github.io/RulersGuides.js/" rel="nofollow">http://mark-rolich.github.io/RulersGuides.js/</a></p>
  
  <p>But I want to apply rulers and guides to a Div. So is there any other library or some fabricJs code snippet to achieve this?</p>
  
  <p>Thanks.</p>