Added barcode field to template

ref #13

src/templates/sponsoring_contract.html

@@ -50,7 +50,7 @@
           <p style="font-size: x-small; display: block;">ID</p>
         </div>
         <div class="column">
-          <!-- CODE Here -->
+          <img width="100%" src="{{--bc '123'}}" />
         </div>
       </div>
       <div class="columns">