pkeyGet is now static and more similar to getKV

Memcached_DataObject now defines
   * pkeyGetClass to avoid collision with Managed_DataObject pkeyGet
   * getClassKV to avoid collision with Managed_DataObject getKV

plugins/Event/RSVP.php

@@ -56,19 +56,6 @@ class RSVP extends Managed_DataObject
     public $response;            // tinyint
     public $created;           // datetime
 
-    /**
-     * Get an instance by compound key
-     *
-     * @param array $kv array of key-value mappings
-     *
-     * @return Bookmark object found, or null for no hits
-     */
-
-    function pkeyGet($kv)
-    {
-        return Memcached_DataObject::pkeyGet('RSVP', $kv);
-    }
-
     /**
      * Add the compound profile_id/event_id index to our cache keys
      * since the DB_DataObject stuff doesn't understand compound keys