Add support for Jekyll Archives plugin

- Option to select GitHub Pages compatible tag/category page archive or plugin generated archives

_includes/category-list.html

@@ -0,0 +1,26 @@
+{% include base_path %}
+
+{% case site.categories.type %}
+  {% when "liquid" %}
+    {% assign path_type = "#" %}
+  {% when "jekyll-archives" %}
+    {% assign path_type = nil %}
+{% endcase %}
+
+{% if site.categories.path %}
+  {% comment %}
+    <!-- Sort alphabetically regardless of case e.g. a B c d E -->
+    <!-- modified from http://www.codeofclimber.ru/2015/sorting-site-tags-in-jekyll/ -->
+  {% endcomment %}
+  {% capture page_categories %}{% for category in page.categories %}{{ category | downcase }}#{{ category }}{% unless forloop.last %},{% endunless %}{% endfor %}{% endcapture %}
+  {% assign category_hashes = (page_categories | split: ',' | sort:0) %}
+
+  <p class="page__taxonomy"><strong>{{ site.data.ui-text[site.locale].categories_label }}</strong> <span itemprop="keywords">
+  {% for hash in category_hashes %}
+    {% assign keyValue = hash | split: '#' %}
+    {% capture category_word %}{{ keyValue[1] | strip_newlines }}{% endcapture %}
+    <a href="{{ base_path }}{{ category_word | slugify | prepend: path_type | prepend: site.categories.path }}" class="page__taxonomy-item" rel="tag">{{ category_word }}</a>{% unless forloop.last %}, {% endunless %}
+  {% endfor %}
+  </span>
+  </p>
+{% endif %}