ALH: Add highlight js for syntax highlighting

layouts/partials/footer_scripts.html

@@ -11,3 +11,11 @@ try {
 } catch(err) {}
 </script>
 {{ end }}
+
+{{ if .Site.Params.HighlightJS }}
+<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.6.0/highlight.min.js"></script>
+
+<script type="text/javascript">
+  hljs.initHighlightingOnLoad();
+</script>
+{{ end }}