Display pre-contest clarifications

We already disclose those in the API, so keep this consistent. This
does result in the `contest time` of that clarification to be negative
but thats factually true.

Author: vmcj

webapp/templates/team/partials/index_content.html.twig

@@ -6,6 +6,10 @@
     <h2 id="contestnotstarted" class="text-center">
         Contest {{ contest | printContestStart }}
     </h2>
+    {% if clarifications is not empty %}
+        <h1 class="teamoverview">Clarifications</h1>
+        {% include 'team/partials/clarification_list.html.twig' with {clarifications: clarifications} %}
+    {% endif %}
 {% else %}
 
     <div id="teamscoresummary">