add author on home posts list

_layouts/home.html

@@ -9,8 +9,13 @@ layout: default
     <ul class="post-list">
       {% for post in site.posts %}
         <li>
+          <span class="post-meta">
+            {% if post.author %}
+              <span itemprop="author" itemscope itemtype="http://schema.org/Person"><span class="p-author h-card" itemprop="name">{{ post.author }}</span></span> • 
+            {% endif %}
             {% assign date_format = site.minima.date_format | default: "%b %-d, %Y" %}
-          <span class="post-meta">{{ post.date | date: date_format }}</span>
+            {{ post.date | date: date_format }}
+          </span>
           <h3>
             <a class="post-link" href="{{ post.url | relative_url }}">{{ post.title | escape }}</a>
           </h3>