feat(microformats): add hAtom class names

* http://microformats.org/wiki/hatom

themes/typing/layout/_partial/article.ejs

@@ -1,14 +1,17 @@
 <article id="<%= post.layout %>-<%= post.slug %>" class="article article-type-<%= post.layout %>" itemscope itemprop="blogPost">
   <%- partial('_partial/header') %>
   <hr/>
-  <div class="article-inner">
+  <div class="hentry article-inner">
     <%- partial('post/gallery') %>
     <% if (post.link || post.title) { %>
       <header class="article-header">
-        <%- partial('post/title', {class_name: 'article-title'}) %>
+        <%- partial('post/title', {class_name: 'entry-title article-title'}) %>
       </header>
     <% } %>
-    <div class="article-entry typo" itemprop="articleBody">
+    <% if (post.subtitle) { %>
+      <p class="entry-summary"><%- post.subtitle %></p>
+    <% } %>
+    <div class="entry-content article-entry typo" itemprop="articleBody">
       <%- toc(page.content, {list_number: false}) %>
       <%- post.content %>
     </div>

themes/typing/layout/_partial/post/date.ejs

@@ -1,2 +1,2 @@
 <%/* Date format is specified to skip timezone conversion */%>
-<time datetime="<%= date(post.date, 'YYYY-MM-DD[T00:00:00.000Z]') %>" itemprop="datePublished"><%= date(post.date, 'D MMM YYYY') %></time>
+<time class="published" datetime="<%= date(post.date, 'YYYY-MM-DD[T00:00:00.000Z]') %>" itemprop="datePublished"><%= date(post.date, 'D MMM YYYY') %></time>

themes/typing/layout/_partial/post/updated-date.ejs

@@ -1,3 +1,3 @@
 <%/* User-specified updated date */%>
 <%/* default post.updated is (almost) always is the time 'hexo generate' is executed */%>
-<time datetime="<%= date(post.lastUpdated, 'YYYY-MM-DD[T00:00:00.000Z]') %>" itemprop="dateUpdated"><%= date(post.lastUpdated, 'D MMM YYYY') %></time>
+<time class="updated" datetime="<%= date(post.lastUpdated, 'YYYY-MM-DD[T00:00:00.000Z]') %>" itemprop="dateUpdated"><%= date(post.lastUpdated, 'D MMM YYYY') %></time>

themes/typing/source/css/typing.css

@@ -572,6 +572,11 @@ textarea {
   transition: color 0.1s linear;
 }
 
+/* Hide post's subtitle in article */
+.entry-summary {
+  display: none;
+}
+
 .archive-container hr,
 .archive-footer hr,
 .article .article-footer hr,