title: TemplateNotFound when installing CKAN python extension
body: <p>I tried to install ckanext-archiver plugin for CKAN following the steps described in <a href="https://github.com/ckan/ckanext-archiver" rel="nofollow noreferrer">GIT page</a>.</p>
  
  <p>However, when I restart the web server, the following error occurs.</p>
  
  <p>I tried using both '<em>pip install</em>' and '<em>python setup.py install/develop</em>' directly from git, downloading the zip, cloning the code in my machine.</p>
  
  <p>The error is always the same when I refresh the server:</p>
  
  <pre><code>Source Template Extra Data Traceback
  WebError Traceback:
  ⇝ TemplateNotFound: package\resource_read.html
  
  Module ckan.controllers.package:1142 in resource_read 
  &gt;&gt;  return render(template, extra_vars=vars)
  Module ckan.lib.base:216 in render
  &gt;&gt;  loader_class=loader_class)
  Module pylons.templating:249 in cached_template
  &gt;&gt;  return render_func()
  Module ckan.lib.base:154 in render_template
  &gt;&gt;  return render_jinja2(template_name, globs)
  Module ckan.lib.base:104 in render_jinja2
  &gt;&gt;  return template.render(**extra_vars)
  Module jinja2.environment:894 in render
  &gt;&gt;  return self.environment.handle_exception(exc_info, True)
  Module c:\users\bp\envs\ckan2.5.2env\src\ckanext-archiver\ckanext\archiver\templates\package\resource_read.html:1 in top-level template 
  &gt;&gt;  {% ckan_extends %}
  Module ckan.lib.jinja_extensions:182 in get_source
  &gt;&gt;  pieces = loaders.split_template_path(template)
  Module jinja2.loaders:33 in split_template_path
  &gt;&gt;  raise TemplateNotFound(template)
  TemplateNotFound: package\resource_read.html
  </code></pre>
  
  <p>I'm using CKAN 2.5.2 installed on Windows 8 and I managed to install other extensions.</p>
  
  <p>The referred page does exist in the path and it has the folowing content:</p>
  
  <pre><code>{% ckan_extends %}
  
  {% block resource_additional_information_inner %}
      {# This is copied from core ckan, but with the changes marked #}
          &lt;div class="module-content"&gt;
            &lt;h2&gt;{{ _('Additional Information') }}&lt;/h2&gt;
            &lt;table class="table table-striped table-bordered table-condensed" data-module="table-toggle-more"&gt;
              &lt;thead&gt;
                &lt;tr&gt;
                  &lt;th scope="col"&gt;{{ _('Field') }}&lt;/th&gt;
                  &lt;th scope="col"&gt;{{ _('Value') }}&lt;/th&gt;
                &lt;/tr&gt;
              &lt;/thead&gt;
              &lt;tbody&gt;
                &lt;tr&gt;
                  &lt;th scope="row"&gt;{{ _('Last updated') }}&lt;/th&gt;
                  &lt;td&gt;{{ h.render_datetime(res.last_modified) or h.render_datetime(res.revision_timestamp) or h.render_datetime(res.created) or _('unknown') }}&lt;/td&gt;
                &lt;/tr&gt;
                &lt;tr&gt;
                  &lt;th scope="row"&gt;{{ _('Created') }}&lt;/th&gt;
                  &lt;td&gt;{{ h.render_datetime(res.created) or _('unknown') }}&lt;/td&gt;
                &lt;/tr&gt;
                &lt;tr&gt;
                  &lt;th scope="row"&gt;{{ _('Format') }}&lt;/th&gt;
                  &lt;td&gt;{{ res.mimetype_inner or res.mimetype or res.format or _('unknown') }}&lt;/td&gt;
                &lt;/tr&gt;
                &lt;tr&gt;
                  &lt;th scope="row"&gt;{{ _('License') }}&lt;/th&gt;
                  &lt;td&gt;{% snippet "snippets/license.html", pkg_dict=pkg, text_only=True %}&lt;/td&gt;
                &lt;/tr&gt;
                {# We replaced h.format_resource_items with h.archiver_format_resource_items so that we can hide the archiver key #}
                {% for key, value in h.archiver_format_resource_items(res.items()) %}
                  &lt;tr class="toggle-more"&gt;&lt;th scope="row"&gt;{{ key }}&lt;/th&gt;&lt;td&gt;{{ value }}&lt;/td&gt;&lt;/tr&gt;
                {% endfor %}
              &lt;/tbody&gt;
            &lt;/table&gt;
          &lt;/div&gt;
  
    {{ h.archiver_is_resource_broken_html(c.resource) }}&lt;br&gt;
    {{ h.archiver_is_resource_cached_html(c.resource) }}
  
  {% endblock %}
  </code></pre>
  
  <p>Can anyone point me what I'm doing wrong?</p>