Fix bug causing non-HTML pages to be displayed in tiles.

.gitignore

@@ -1,5 +1,6 @@
 _site/
 .sass-cache/
 .jekyll-metadata
+.jekyll-cache
 Gemfile.lock
 *.gem

_includes/header.html

@@ -17,7 +17,7 @@
 		        <li><a href="{{ "" | absolute_url }}/">{{ page.title }}</a></li>
 	    	{% endif %}
 		{% endfor %}
-		{% for page in site.pages %}
+		{% for page in site.html_pages %}
 		    {% if page.layout != "home" and page.nav-menu == true %}
 		        <li><a href="{{ page.url | absolute_url }}">{{ page.title }}</a></li>
 		    {% endif %}

_includes/tiles.html

@@ -12,7 +12,7 @@
   </article>
   {% endif %}
   {% endfor %}
-  {% for page in site.pages limit:site.tiles-count %}
+  {% for page in site.html_pages limit:site.tiles-count %}
   {% if site.tiles-source == 'pages' and page.show_tile != false %}
   <article>
     <span class="image">