Remove our categorization hack, and add category view pages instead.

_includes/category_list.html

@@ -1,7 +1,7 @@
 <h1 class="page-heading">{{ include.category | capitalize }}</h1>
 
 <ul class="post-list">
-  {% for post in site.categories[include.category] limit:5 %}
+  {% for post in site.categories[include.category] limit:include.limit %}
     <li>
       <span class="post-meta">{{ post.date | date: "%Y-%m-%d" }}</span>
       <h2>