Add file extensions back to non-helper _includes

_includes/analytics.html

@@ -2,11 +2,11 @@
 
 {% case site.analytics.provider %}
 {% when "google" %}
-  {% include /analytics-providers/google %}
+  {% include /analytics-providers/google.html %}
 {% when "google-universal" %}
-  {% include /analytics-providers/google-universal %}
+  {% include /analytics-providers/google-universal.html %}
 {% when "custom" %}
-  {% include /analytics-providers/custom %}
+  {% include /analytics-providers/custom.html %}
 {% endcase %}
 
 {% endif %}

_includes/browser-upgrade

@@ -1 +0,0 @@
-<!--[if lt IE 9]><div class="browser-upgrade alert alert-info">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div><![endif]-->

_includes/browser-upgrade.html

@@ -0,0 +1,3 @@
+<!--[if lt IE 9]>
+<div class="notice--danger center">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</div>
+<![endif]-->

_includes/head.html

@@ -1,6 +1,6 @@
 <meta charset="utf-8">
 
-{% include seo %}
+{% include seo.html %}
 
 <link href="{{ base_path }}/feed.xml" type="application/atom+xml" rel="alternate" title="{{ site.title }} Feed">
 

_includes/page__taxonomy.html

@@ -0,0 +1,15 @@
+{% comment %}
+  <!-- Sort page.tags alphabetically regardless of case e.g. a B c d E -->
+  <!-- modified from http://www.codeofclimber.ru/2015/sorting-site-tags-in-jekyll/ -->
+{% endcomment %}
+
+{% capture page_tags %}{% for tag in page.tags %}{{ tag | downcase }}#{{ tag }}{% unless forloop.last %},{% endunless %}{% endfor %}{% endcapture %}
+{% assign tag_hashes = (page_tags | split: ',' | sort:0) %}
+
+Filed under: <span class="post__taxonomy-wrapper" itemprop="keywords">
+{% for hash in tag_hashes %}
+  {% assign keyValue = hash | split: '#' %}
+  {% capture tag_word %}{{ keyValue[1] | strip_newlines }}{% endcapture %}
+    {% if forloop.last %} and{% endif %} <a href="{{ site.url }}{{ tag_word | slugify | prepend: '/tag/' | append: '/' }}" class="post__taxonomy-item" rel="tag">{{ tag_word }}</a>{% unless forloop.last %}, {% endunless %}
+{% endfor %}
+</span>

_includes/scripts.html

@@ -2,5 +2,5 @@
 <script>window.jQuery || document.write('<script src="{{ base_path }}/assets/js/vendor/jquery-1.9.1.min.js"><\/script>')</script>
 <script src="{{ base_path }}/assets/js/main.min.js"></script>
 
-{% include analytics %}
-{% include comments %}
+{% include analytics.html %}
+{% include comments.html %}