Add Vidalia members links

templates/membership.html

@@ -80,17 +80,23 @@
     <h3 class="col-12 text-primary display-4 pb-4">Vidalia Onion Members</h3>
     <div class="col-md-3 col-xl-3 my-2">
       <div class="card border-1 h-100">
+        <a href="https://www.avast.com" target="_blank" title="Avast">
           <img class="card-img-top" src="{{ '../../static/images/membership/logos/avast.png' }}" alt="Avast">
+        </a>
       </div>
     </div>
     <div class="col-md-3 col-xl-3 my-2">
       <div class="card border-1 h-100">
+        <a href="https://team-cymru.com" target="_blank" title="Cymru">
           <img class="card-img-top" src="{{ '../../static/images/membership/logos/cymru.png' }}" alt="Cymru">
+        </a>
       </div>
     </div>
     <div class="col-md-3 col-xl-3 my-2">
       <div class="card border-1 h-100">
+        <a href="https://mullvad.net" target="_blank" title="MullvadVPN">
           <img class="card-img-top" src="{{ '../../static/images/membership/logos/mullvad.png' }}" alt="MullvadVPN">
+        </a>
       </div>
     </div>
     <div class="col-md-3 col-xl-3 my-2">