#86 Email enhancement

* adds object titles to email sending

templates/email/sharing/shared_access_given.html

@@ -11,6 +11,8 @@
         <br>
         <strong>{{obj_identifier}}</strong>
         <br>
+        <strong>"{{obj_title}}"</strong>
+        <br>
         {% trans 'This means you can now edit this dataset.' %}
         {% trans 'The shared dataset appears now by default on your overview for this dataset type.' %}
         <br>