fix: Hide person details from non-admin users

See #35

people/templates/people/person/detail.html

@@ -14,6 +14,14 @@
 
     <hr>
 
+    {% if person.user == request.user or request.user.is_superuser %}
+        {% if person.user != request.user and request.user.is_superuser %}
+            <div class="alert alert-warning">
+                <strong>NB:</strong> You are able to see the details of this person because you are an admin.
+                Regular users are not able to see this information for people other than themselves.
+            </div>
+        {% endif %}
+
         <dl>
             {% if person.gender %}
                 <dt>Gender</dt>
@@ -69,6 +77,7 @@
                 </dd>
             {% endif %}
         </dl>
+    {% endif %}
 
     <a class="btn btn-success"
        href="{% url 'people:person.update' pk=person.pk %}">Update</a>