title: How to change django wagtail's admin logo
body: <p>I am working on a small project and I thought I'd give <a href="http://wagtail.io/" rel="nofollow noreferrer">wagtail</a> a try. I am now wondering how I could change wagtail's admin logo in the sidebar (top left image on the picture bellow).</p>
  
  <p><img src="https://i.stack.imgur.com/kxWmn.png" alt="github wagtail image"></p>
  
  <p>I could change <code>/static/wagtailadmin/images/wagtail-logo.svg</code> directly but it'd be wrong ;).</p>