Fix deprecated config params (GA, Disqus) (#355)

As of Hugo 0.120.0, `.Site.disqusShortname` and `.Site.googleAnalytics` are deprecated. Backward
compatible change, new notation supported from Hugo v0.41. See
gohugoio/hugo@4ddcf52

Author: Vimux

README.md

@@ -56,8 +56,13 @@ title = "Mainroad"
 languageCode = "en-us"
 paginate = "10" # Number of posts per page
 theme = "mainroad"
-disqusShortname = "" # Enable Disqus comments by entering your Disqus shortname
-googleAnalytics = "" # Enable Google Analytics by entering your tracking id
+disqusShortname = "" # DEPRECATED! Use .Services.Disqus.Shortname
+googleAnalytics = "" # DEPRECATED! Use .Services.googleAnalytics.ID
+
+[services.disqus]
+  shortname = "" # Enable Disqus by entering your Disqus shortname
+[services.googleAnalytics]
+  ID = "" # Enable Google Analytics by entering your tracking ID
 
 [Author] # Used in authorbox
   name = "John Doe"

layouts/partials/comments.html

@@ -1,4 +1,4 @@
-{{ if and .Site.DisqusShortname (index .Params "comments" | default "true") (not .Site.IsServer) }}
+{{ if and .Site.Config.Services.Disqus.Shortname (index .Params "comments" | default "true") (not .Site.IsServer) }}
 <section class="comments">
 	{{ template "_internal/disqus.html" . }}
 </section>