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/helpers/gallery_task.php

@@ -66,7 +66,7 @@ class gallery_task_Core {
         }
 
         $item = ORM::factory("item", $row->id);
-        if ($item->loaded) {
+        if ($item->loaded()) {
           try {
             graphics::generate($item);
             $completed++;