Add fathom support

Add fathom support if you have a `fathomurl` specified in your config

Signed-off-by: Eli Uriegas <seemethere101@gmail.com>

layouts/partials/footer_scripts.html

@@ -24,6 +24,23 @@
   <script src="{{ .Site.BaseURL }}js/social-share-kit.min.js" defer></script>
 {{ end }}
 
+{{ if .Site.Params.fathomurl }}
+<!-- Fathom - simple website analytics - https://github.com/usefathom/fathom -->
+<script>
+(function(f, a, t, h, o, m){
+	a[h]=a[h]||function(){
+		(a[h].q=a[h].q||[]).push(arguments)
+	};
+	o=f.createElement('script'),
+	m=f.getElementsByTagName('script')[0];
+	o.async=1; o.src=t; o.id='fathom-script';
+	m.parentNode.insertBefore(o,m)
+})(document, window, '//{{ .Site.Params.fathomurl }}/tracker.js', 'fathom');
+fathom('trackPageview');
+</script>
+<!-- / Fathom -->
+{{ end }}
+
 {{ template "_internal/google_analytics_async.html" . }}
 
 <script>