reduce queries for fetching many node`s data

As described in the cmf-mailing list (https://groups.google.com/forum/#!topic/symfony-cmf-devs/Bv3REKYwT80), this would be my first changes for reducing queries. There is still an test issue i will solve later.
i think i know what you mean:

``` 
    private function getNodeData($path, $row)
    {
        return $this->getNodesData(array($row));
    }
``` 

or even earlier, right?