add gitter link

Author: yihui

README.md

@@ -1,3 +1,5 @@
 # Rbind Support
 
+[![Gitter](https://badges.gitter.im/rbind/support.svg)](https://gitter.im/rbind/support?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
 This is the source repository for the Rbind Support website. See <https://support.rbind.io> for more information.

config.toml

@@ -46,6 +46,7 @@ footnotereturnlinkcontents = "↩"
 	title404 = ""
 	subtitle404 = ""
 	githubRepo = "https://github.com/rbind/support"
+	gitter = "rbind/support"
 
   # options for highlight.js (version, additional languages, and theme)
   highlightjsVersion = "9.11.0"

themes/hugo-cactus-theme/layouts/partials/nav.html

@@ -12,6 +12,10 @@
 	<a href="{{ . }}">Github</a>
 	{{ end }}
 
+	{{ with .Site.Params.Gitter }}
+	<a href="https://gitter.im/{{ . }}">Gitter</a>
+	{{ end }}
+
 	{{ if .Site.Params.enableRSS }}
 	<a class="cta" href="{{ .Site.RSSLink }}">{{ with .Site.Params.subscribe }}{{ . }}{{ else }}Subscribe{{ end }}</a>
 	{{ end }}