Add related param

It is possible to turn on/off related content block

README.md

@@ -89,6 +89,7 @@ googleAnalytics = "" # Enable Google Analytics by entering your tracking id
   toc = true # Enable Table of Contents for all site pages
   tocOpen = true # Open Table of Contents block. Optional
   comments = true # Enable comments for all site pages
+  related = true # Enable Related content for single pages
   mathjax = true # Enable MathJax for all site pages
   mathjaxPath = "https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" # Specify MathJax path. Optional
   mathjaxConfig = "TeX-AMS-MML_HTMLorMML" # Specify MathJax config. Optional

layouts/partials/related.html

@@ -1,9 +1,9 @@
 {{ $related := .Site.RegularPages.Related . | first 5 }}
-{{ with $related }}
+{{ if and ($related) (.Param "related") }}
 <div class="related block">
 	<h3 class="related__title">{{ T "related_title" }}</h3>
 	<ul class="related__list">
-		{{ range . }}
+		{{ range $related }}
 		<li class="related__item"><a class="related__link" href="{{ .RelPermalink }}">{{ .Title }}</a></li>
 		{{ end }}
 	</ul>