Add GitHub link in the footer

Signed-off-by: jonasrosland <jrosland@vmware.com>

site/_config.yml

@@ -31,6 +31,9 @@ footer_social_links:
   RSS:
     fa_icon: fa fa-rss
     url: feed.xml
+  GitHub:
+    fa_icon: fab fa-github
+    url: https://github.com/heptio/velero
 
 defaults:
   - scope:

site/_includes/footer.html

@@ -16,7 +16,7 @@
 <footer class="section site-footer">
     <div class="section-content">
         <div class="row justify-content-between align-items-center">
-            <div class="col-12 col-md-5 mb-3 mb-md-0">
+            <div class="col-12 col-md-8 mb-3 mb-md-0">
                 <ul class="social-links text-center text-md-left">
                     {% for link in site.footer_social_links %}
                     <li>
@@ -27,7 +27,7 @@
                     {% endfor %}
                 </ul>
             </div>
-            <div class="col-12 col-md-7 text-center text-md-right">
+            <div class="col-12 col-md-4 text-center text-md-right">
               <a href="/" alt="Homepage"><img src="/img/{{ site.logo }}" class="logo" /></a>
             </div>
         </div>
@@ -49,4 +49,4 @@
 <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" crossorigin="anonymous"></script>
 
 <script src="/js/jquery.matchHeight.js?{{site.time | date: '%s%N'}}"></script>
-<script src="/js/scripts.js?{{site.time | date: '%s%N'}}"></script>
+<script src="/js/scripts.js?{{site.time | date: '%s%N'}}"></script>