added a missing file

www.i2p2/pages/_urlify

@@ -0,0 +1,7 @@
+{% macro urlify url, title, suffix %}
+    {% if static %}
+    <a href="{{url}}.{{suffix}}">{{title}}</a>
+    {% else %}
+    <a href="{{url}}">{{title}}</a>
+    {% endif %}
+{% endmacro %}