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/gallery/controllers/simple_uploader.php

@@ -72,7 +72,7 @@ class Simple_Uploader_Controller extends Controller {
           module::event("add_photos_form_completed", $item, $form);
         }
       } catch (Exception $e) {
-        Kohana::log("alert", $e->__toString());
+        Kohana_Log::add("alert", $e->__toString());
         if (file_exists($temp_filename)) {
           unlink($temp_filename);
         }