Change .html.twig to .html

Change other file extensions for consistency.

source/_partials/footer-scripts.html

@@ -0,0 +1,20 @@
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
+<script src="{{ site.url }}/{{ theme_path('assets/js/bootstrap.min.js') }}"></script>
+
+{% block scripts %}{% endblock %}
+
+{% if page.tweets == true %}
+  <script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>
+{% endif %}
+
+{% if site.google_analytics_tracking_id %}
+  <script>
+    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+    })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+
+    ga('create', '{{ site.google_analytics_tracking_id }}', 'auto');
+    ga('send', 'pageview');
+  </script>
+{% endif %}