Add message that full MP candidates aren't out yet

wcivf/apps/elections/templates/elections/postcode_view.html

@@ -58,6 +58,13 @@ <h3>{{ postelection.post.label }}</h3>
 
     {% if postelection.people %}
       <h3>Candidates</h3>
+      {% if postelection.election.slug == "parl.2017-06-08" %}
+      <strong>
+        These are the only candidates that have been announced so far. We will have a full list
+        of candidates by the 12th of May.
+        <a href="https://candidates.democracyclub.org.uk/">Let us know if we're missing anyone.</a>
+      </strong>
+      {% endif %}
       {% if postelection.election.uses_lists %}
       <p>You will vote for your preferred party rather than a candidate on this ballot paper</p>
       {% include "elections/includes/_people_list_with_lists.html" with people=postelection.people %}