Adds og:site_name support (#699)

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## Unreleased version
 
+- Add Open Graph `site_name` field
 - Add `text-col `config setting for main text color (#694)
 - Add `keywords` config setting to set the meta keywords on all pages (for SEO purposes) (#691)
 - Add `mobile-theme-col` config setting to allow a mobile theme colour (#692)

_includes/head.html

@@ -63,6 +63,10 @@
   <meta property="fb:app_id" content="{{ site.fb_app_id }}">
   {% endif %}
 
+  {% if site.title %}
+  <meta property="og:site_name" content="{{ site.title }}">
+  {% endif %}
+
   {% if page.meta-title %}
   <meta property="og:title" content="{{ page.meta-title }}">
   {% elsif page.title %}
@@ -71,7 +75,7 @@
   <meta property="og:title" content="{{ site.title }}">
   {% endif %}
 
-   {% if page.meta-description %}
+  {% if page.meta-description %}
   <meta property="og:description" content="{{ page.meta-description }}">
   {% elsif page.subtitle %}
   <meta property="og:description" content="{{ page.subtitle }}">