Add an announcement banner

kfet/static/kfet/css/kpsul.css

@@ -18,6 +18,17 @@ input[type=number]::-webkit-outer-spin-button {
     100% { background: yellow; }
 }
 
+/* Announcements banner */
+
+#banner {
+  background-color: #d86b01;
+  width: 100%;
+  text-align: center;
+  padding: 10px;
+  color: white;
+  font-size: larger;
+}
+
 /*
  * Top row
  */

kfet/templates/kfet/base_messages.html

@@ -1,3 +1,10 @@
+{% if config.gestion_banner %}
+  <div id="banner" class="container">
+    <span class="glyphicon glyphicon-bullhorn"></span>
+    <span>{{ config.gestion_banner }}</span>
+  </div>
+{% endif %}
+
 {% if messages %}
 <div class="row messages">
   {% for message in messages %}