Added a hidedate option to article.ejs

Signed-off-by: Xiaofeng QU <xiaofeng.qu.hk@ieee.org>

layout/_partial/article.ejs

@@ -8,7 +8,9 @@
       <header class="article-header">
         <%- partial('post/title', {class_name: 'article-title'}) %>
 	      <div class="article-meta">
+          <% if (!post.hidedate){ %>
             <%- partial('post/date', {class_name: 'article-date', date_format: null}) %>
+          <% } %>
           <%- partial('post/category') %>
         </div>
       </header>