Layout improvements.

index.html

@@ -3,8 +3,8 @@ layout: default
 ---
 <div class="home">
   {% for category in site.categories %}
-  {% if category.first == "meta" %} {% continue %} {% endif %}
-    <div class="column">
+    {% if category.first == "meta" %} {% continue %} {% endif %}
+    <div class="column col-{{site.categories.size | minus: 1}}">
       {% include category_list.html category=category.first %}
     </div>
   {% endfor %}