Preliminary work to cut over to Kohana 2.4

- Kohana::log() -> Kohana_Log::add()
- Kohana::config_XXX -> Kohana_Config::instance()->XXX
- Implement View::set_global in MY_View
- Updated Cache_Database_Driver to latest APIs
- ORM::$loaded -> ORM::loaded()
- Updated item::viewable() to use K2.4 parenthesization

modules/comment/controllers/admin_comments.php

@@ -110,7 +110,7 @@ class Admin_Comments_Controller extends Admin_Controller {
 
     $comment = ORM::factory("comment", $id);
     $orig = clone $comment;
-    if ($comment->loaded) {
+    if ($comment->loaded()) {
       $comment->state = $state;
       $comment->save();
     }