module-and-template-store/app/views/extensions/index.html.erb

  <div class="row">
    <% @extensions.each do |extension| %>
        <div class="col-lg-4">
          <h3><%=link_to extension.title, extension %></h3>
          <p><b>Author:</b> <%= extension.author %></p>
          <p><%=image_tag extension.preview.thumb.url%></p>
          <p><%= link_to 'View details &raquo;'.html_safe ,extension, :class=>"btn btn-primary"%></p>
        </div>
    <%end%>