Footer links, Gitlab header link

themes/briar/layouts/partials/footer.html

@@ -22,6 +22,9 @@
       <ul>
         <li><a href="/copyright">Copyright</a></li>
         <li><a href="/privacy-policy">Privacy</a></li>
+        <li><a href="/governance">Governance</a></li>
+        <li><a href="/code-of-conduct">Code of Conduct</a></li>
+        <li><a href="/hiring">Jobs</a></li>
         <li>Site design by Reflective Spaces</li>
       </ul>
     </div> <!-- footer -->

themes/briar/layouts/partials/header.html

@@ -3,6 +3,9 @@
         <a href="/"><div id="logo"><img src="/img/briar_logo_large.png" alt="Briar" class="logo"/></div></a>
         <div id="nav">
           <div id="signup">
+            <div id="twitter">
+              <a href="https://code.briarproject.org/briar" rel="noopener noreferrer"><img class="twitterbutton" src="/img/gitlab.png" alt="Small GitLab logo"/></a>
+            </div> <!-- GitLab -->
             <div id="twitter">
               <a href="https://twitter.com/BriarApp" rel="noopener noreferrer"><img class="twitterbutton" src="/img/twitter.png" alt="Small twitter logo"/></a>
             </div> <!-- twitter -->