Fix build failing if taxonomy is set to anything other than "tags" (fixes #126)

This does not fix other issues however, notably links still point to
/tags, and it's displayed as tags in the UI.

templates/taxonomy_list.html

@@ -10,7 +10,7 @@
 
 <ul class="tags">
 	{%- for tag in terms -%}
-		<li><a href="{{ get_taxonomy_url(kind='tags', name=tag.name, lang=lang) }}"><span class="tag">{{ tag.name }}</span><span class="count">{{ tag.pages | length }}</span></a></li>
+		<li><a href="{{ current_url }}{{ tag.slug }}"><span class="tag">{{ tag.name }}</span><span class="count">{{ tag.pages | length }}</span></a></li>
 	{%- endfor -%}
 </ul>
 {% endblock content %}