#86 Email enhancement

* adds object titles to email sending

templates/email/checking/shared_data_checked.html

@@ -11,6 +11,8 @@
         <br>
         <strong>{{obj_identifier}}</strong>
         <br>
+        <strong>{{obj_title}}</strong>
+        <br>
         {% trans 'This means, the responsible registration office just confirmed the correctness of this dataset.' %}
         <br>
         <br>