title: Send additional variables to page response in Django CMS
body: <p>I'm using Django CMS and am trying to figure out how to extend a view for a CMS page. For example, let's say I created a page called "About" in the CMS (/about) that is using the about_template.html file. Before I render the template I'd like to be able to send
  additional variables to the response. How do I overwrite the view to send these additional variables to the about page?</p>