Add untracked files

blog.bryanroessler.com/_includes/just_comments.html

@@ -0,0 +1,4 @@
+{%- if site.just-comments -%}
+<div class="just-comments" data-apikey="{{site.just-comments}}"></div>
+<script async src="https://just-comments.com/w2.js"></script>
+{%- endif -%}

blog.bryanroessler.com/_includes/mathjax.html

@@ -0,0 +1,12 @@
+{% if page.mathjax %}
+<script type="text/javascript">
+  MathJax = {
+    options: {
+      skipHtmlTags: [
+        'script', 'noscript', 'style', 'textarea', 'pre', 'code'
+      ]
+    }
+  };
+</script>
+<script type="text/javascript" async src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
+{% endif %}