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/user/controllers/password.php

@@ -47,7 +47,7 @@ class Password_Controller extends Controller {
     $valid = $form->validate();
     if ($valid) {
       $user = user::lookup_by_name($form->reset->inputs["name"]->value);
-      if (!$user->loaded || empty($user->email)) {
+      if (!$user->loaded() || empty($user->email)) {
         $form->reset->inputs["name"]->add_error("no_email", 1);
         $valid = false;
       }