Show announcements in timetable views

Blocked by AlekSIS!184 (merged)

Closes #63 (closed)

aleksis/apps/chronos/templates/chronos/my_timetable.html

@@ -26,7 +26,7 @@
 
   <div class="row nomargin">
     <div class="col m12 s12 l6 xl4">
-      {#            {% include "timetable/hintsinplan.html" %}#}
+      {% include "core/announcements.html" with announcements=announcements %}
     </div>
   </div>