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/permissions.php

@@ -57,7 +57,7 @@ class Permissions_Controller extends Controller {
     access::required("view", $item);
     access::required("edit", $item);
 
-    if (!empty($group) && $perm->loaded && $item->loaded) {
+    if (!empty($group) && $perm->loaded() && $item->loaded()) {
       switch($command) {
       case "allow":
         access::allow($group, $perm->name, $item);