Refactor site admin menu into a theme function and build the menus in

the various modules.  In the process, rename xxx_menu::site_navigation() to just
xxx_menu::site().  And add xxx_menu::admin().

The menus are the same as before, but I changed the HTML to be
consistent with the way that we do it in the regular site, and this
broke the superfish styles.  I don't know how to fix this.. help me
Chad!

modules/comment/helpers/comment_menu.php

@@ -0,0 +1,28 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2008 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class comment_menu_Core {
+  public static function admin($menu, $theme) {
+    $menu->get("content_menu")
+      ->append(Menu::factory("link")
+               ->id("comments")
+               ->label(_("Comment Moderation"))
+               ->url("#"));
+  }
+}