OCTOPRESS: create categories page index.html

index.html

---
layout: default
title: Blog Categories
---

{% for item in site.categories %}
    <div class="category-block">
    	<h2 class="category-title-{{ item[0] | downcase }}"><a href="{{ root_url }}/categories/{{ item[0] | downcase | replace:' ','-' | replace:'é','e'}}/">{{ item[0] | capitalize }}</a></h2>
    </div>
{% endfor %}