Add JetBrains as affiliate member.

Author: sjrd

_layouts/frontpage.html

@@ -271,6 +271,11 @@ <h2>Brought to you by</h2>
               <div class="col-sm-3 supporter-logo">
                 <a href="https://virtuslab.com/" style="border: none;" target="_blank"><img src="{{ site.baseurl }}/resources/img/virtuslab.png" /></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
               </div>
+              <br/><br/>
+              <div class="subtitle col-sm-12" id="advisory-board-member-list">Affiliate members:</div>
+              <div class="col-sm-3 supporter-logo">
+                <a href="https://www.jetbrains.com/" style="border: none;" target="_blank"><img src="{{ site.baseurl }}/resources/img/jetbrains.png" /></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
+              </div>
             </div>
             <div class="col-md-12 text-center">
               <!--<span class="subtitle col-sm-12">Community representatives:</span>