Add religion placeholder, make top category menu code cleaner.

index.html

@@ -3,11 +3,10 @@ layout: default
 ---
 <div class="home">
   <div class="category-menu">
-    {% for category in site.categories %}
-      {% if category.first == "meta" %} {% continue %} {% endif %}
+    {% for category in site.category_titles %}
         <span class="category-link">
           <a href="{{category.first | prepend: site.baseurl}}">
-            {{ site.category_titles[category.first] }}
+            {{ category.last }}
           </a>
         </span>
     {% endfor %}
@@ -28,10 +27,10 @@ layout: default
   <p class="post-meta" style="margin-top: 40px">
     For more posts, choose a category:
     <ul>
-      {% for category in site.categories %}
+      {% for category in site.category_titles %}
       <li>
         <a href="{{category.first | prepend: site.baseurl}}">
-          {{category.first}}
+          {{category.last}}
         </a>
       </li>
       {% endfor %}