fixed csrf token for ankündigungen

templates/index.html

@@ -54,7 +54,7 @@
 	<div class="col-xs-12">
 		<ul class="list-inline pull-right">
 			<li style="padding-right: 0px;">
-				<a class="btn btn-default" href="{{ url_for('create', table='announcements', text='Neue Ankündigung', time_publish=datetime.now().replace(hour=0, minute=0, second=0, microsecond=0), time_expire=datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)+timedelta(days=7), ref=request.url) }}">Neue Ankündigung</a>
+				<a class="btn btn-default" href="{{ url_for('create', table='announcements', text='Neue Ankündigung', time_publish=datetime.now().replace(hour=0, minute=0, second=0, microsecond=0), time_expire=datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)+timedelta(days=7), ref=request.url, _csrf_token=session['_csrf_token']) }}">Neue Ankündigung</a>
 			</li>
 		</ul>
 	</div>