Fix template to suport empty social parameter

layouts/partials/home.html

@@ -2,10 +2,12 @@
   <div class="about">
     <h1>{{ .Site.Params.author }}</h1>
     <h2>{{ .Site.Params.info }}</h2>
+    {{ with .Site.Params.social }}
     <ul>
-      {{ range sort .Site.Params.social }}
+      {{ range sort .}}
       <li><a href="{{ .url }}">{{ .name }}</a></li>
       {{ end }}
     </ul>
+    {{ end }}
   </div>
 </section>