Move netlify badge to be served from site

Instead of serving it remotely from netlify. Now we have control of it.

Signed-off-by: Matt Stratton <matt.stratton@gmail.com>

Author: mattstratton

layouts/partials/footer.html

@@ -63,7 +63,7 @@ <h3 class="footer-nav">About</h3>
     <br />
     <br />
     <a href="https://www.netlify.com">
-      <img src="https://www.netlify.com/img/global/badges/netlify-light.svg"/>
+      <img src="{{ "img/netlify-light.svg" | absURL }}" alt="Deploys by Netlify">
     </a>
 </div>
     </div>