Add admin mode

templates/login.html

@@ -0,0 +1,16 @@
+{% extends "base.html" %}
+
+{% block title %}Conference archive{% endblock %}
+
+  {% block content %}
+  <h1>Conference archive</h1>
+
+  <div>Admin login.</div>
+
+  <form method="POST">
+    <label for="password">Password:</label>
+    <input type="password" id="password" name="password"/>
+    <button>login</button>
+  </form>
+
+{% endblock %}

templates/person.html

@@ -45,7 +45,7 @@
   {% endif %}
   </p>
 
-  {% if config.ADMIN_MODE %}
+  {% if is_admin() %}
   {% set search_for = item.name + ' ' + " haswbstatement:P31=Q5" %}
   <p><a href="https://www.wikidata.org/w/index.php?search={{ search_for | urlencode }}&title=Special%3ASearch&ns0=1&ns120=1">Search for {{ item.name }} on Wikidata</a></p>