[#362] Fix api info for non-js browsing

ckan/templates/package/snippets/data_api_button.html

@@ -6,7 +6,8 @@
 #}
 {% if true or resource.webstore_url %}
   {% set loading_text = _('Loading...') %}
-  <a class="btn btn-success" href="#" data-module="api-info" data-module-template="{% url_for controller='api', action='snippet', ver=1, snippet_path='api_info.html', datastore_root_url=datastore_root_url, resource_id=resource.id %}" data-loading-text="{{ loading_text }}"><i class="icon-beaker icon-large"></i> Data API</a>
+  {% set api_info_url = h.url_for(controller='api', action='snippet', ver=1, snippet_path='api_info.html', datastore_root_url=datastore_root_url, resource_id=resource.id) %}
+  <a class="btn btn-success" href="{{ api_info_url }}" data-module="api-info" data-module-template="{{ api_info_url }}" data-loading-text="{{ loading_text }}"><i class="icon-beaker icon-large"></i> Data API</a>
 {% else %}
   <a class="btn disabled" rel="tooltip" title="Data API is unavailable for this resource as DataStore is disabled"><i class="icon-beaker icon-large"></i> Data API</a>
 {% endif %}