add meetup icon with link (#129)

Author: nekablair

_layouts/default.html

@@ -157,6 +157,11 @@ <h1 class="text-light">Send word our way</h1>
                   <i class="fab fa-slack"></i>
                 </a>
               </li>
+              <li class="list-inline-item">
+                <a href="https://www.meetup.com/memphis-technology-user-groups/" target="_blank" rel="noopener" aria-label="Code Connector's Meetup">
+                  <i class="fab fa-meetup"></i>
+                </a>
+              </li>
               <li class="list-inline-item">
                 <a href="https://www.facebook.com/codeconnector" target="_blank" rel="noopener" aria-label="Code Connector's Facebook">
                   <i class="fab fa-facebook-f"></i>