add subtitle

layouts/_default/post.html

@@ -8,6 +8,9 @@
     <section class="post-content">
       {{ if .Params.noToc }}
         <h2 class="post-title" id="title">{{ .Title }}</h2>
+        {{ with .Params.subTitle }}
+        <h3> {{ . }}</h3>
+        {{ end }}
         <section class="post-teaser">
           {{ .Params.place }}, {{ .Date.Format "2.1.2006" }} - {{ .Description}}
         </section>