Added hiding of blog posts

src/documents/blog.html.ejs

@@ -7,6 +7,7 @@ referencesOthers: true
 ---
 <% var posts = getCollection("posts").toJSON() %>
 <% posts.forEach(function(post){ %>
+  <% if(!post.hidden){ %>
     <div class="post">
       <h2 class="title"><a href="<%- post.url %>"><%= post.title %></a></h2>
       <h3 class="subtitle"><%- post.subtitle %></h3>
@@ -16,4 +17,5 @@ referencesOthers: true
       </div>
       <a class="morelink" href="<%- post.url %>">Read More...</a>
     </div>
+  <% } %>
 <% }) %>