Add mySociety blurb and logo to sponsor page

Author: oalders

root/about/sponsors.tx

@@ -174,6 +174,26 @@ money...
           </p>
         </td>
       </tr>
+      <tr>
+        <td>
+          <a target="_blank" rel="noopener nofollow" href="https://www.mysociety.org/">
+            <img src="/static/images/sponsors/mysociety-logo-white-background.jpg" width="170">
+          </a>
+        </td>
+        <td>
+          <p>
+           <a target="_blank" rel="noopener nofollow"
+           href="https://www.mysociety.org/">mySociety</a> is a not for profit
+           group pioneering the use of online technologies to empower citizens
+           to take their first steps towards greater civic participation. We
+           work across four interlinked practice areas: Transparency,
+           Democracy, Climate and Community, each underpinned by research,
+           sector building through TICTeC and appropriate commercial work via
+           <a target="_blank" rel="noopener nofollow"
+           href="https://www.societyworks.org/">SocietyWorks</a>.
+          </p>
+        </td>
+      </tr>
       <tr>
         <td>
           <a target="_blank" rel="noopener nofollow" href="https://github.com/">