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/libraries/MY_ORM.php

@@ -21,16 +21,6 @@ class ORM extends ORM_Core {
   // Track the original value of this ORM so that we can look it up in ORM::original()
   protected $original = null;
 
-  public function open_paren() {
-    $this->db->open_paren();
-    return $this;
-  }
-
-  public function close_paren() {
-    $this->db->close_paren();
-    return $this;
-  }
-
   public function save() {
     model_cache::clear();
     $result = parent::save();