Added Zeiss to footer

wiki/footer.html

@@ -11,8 +11,10 @@
     </div>
     </p>
     <hr> 
-    <div class="col" id="#Sponsors">
-      
+    <div class="col-2" id="#Zeiss">
+      <a href="http://www.zeiss.de/naturwissenschaften">
+      <img class="img-fluid" src="https://static.igem.wiki/teams/5247/sponsors/online-zeiss-logo-rgb.png" />
+      </a>
     </div>
     <hr>
     <!-- The following MUST be on every page: license information and link to the repository on gitlab.igem.org -->