sort items on index pages by 'section' attribute instead of alphabetical order

Author: ajpiano

layouts/dex.html

@@ -14,7 +14,7 @@ <h2 class="title"><%= @item[:title] %></h2>
 			<% myFolder = @item[:filename].split('/')[1] %>
 			<% folderItems = @items.group_by {|item| item[:filename].split('/')[1] } %>
 			<ul>
-				<% folderItems[ myFolder ].sort_by {|item| item[:title] || "" }. each do |item| %>
+				<% folderItems[ myFolder ].sort_by {|item| item[:section] || 0 }. each do |item| %>
 					<% if item[:title] && !(item[:filename] =~ /\/dex\.md$/) %>
 					<li><a href="<%= item.path %>"><%= item[:title] %></a></li>
 					<% end %>