Integrate the navigation menu with the cssmenu code.

Customizes the navigation tree generation to nest properly and to add the "has-sub" CSS class instead of "tree-view" for root items.

css/ddox.css

@@ -82,7 +82,7 @@ col.caption {
 	min-width: 170pt;
 }
 
-#navigation ul.tree-view a.package {
+#navigation #cssmenu a.package {
 	background-image: none;
 }
 

dpl-docs/views/ddox.inc.module-tree.dt

@@ -0,0 +1,14 @@
+- import ddox.entities;
+
+- void moduleNavTree(Package pack)
+	- string pack_class = pack is info.rootPackage ? "has-sub" : "tree-view";
+	- foreach(i, p; pack.packages)
+		li(class='#{!pack.parent && i == 0 && !info.node.parent || p.isAncestorOf(info.node) ? pack_class : pack_class ~ " collapsed"}')
+			a.package(href="#")= p !is info.rootPackage ? p.name : null
+			ul.tree-view
+				- moduleNavTree(p);
+	- foreach(m; pack.modules)
+		li
+			a.module(href="#{info.linkTo(m)}", class='#{info.node is m || m.isAncestorOf(info.node) ? "selected" : ""}')= m.name
+
+- moduleNavTree(info.rootPackage);