[development] GSoC Aggregator patch

[Novák Áron]

I rolled out the patch against HEAD aggregator:
http://drupal.org/node/236237#comment-923418

I would like to ask everyone interested in aggregation topic: please review it 
and tell your opinion.
Important to know:
It will definitely break your tests because the new tests are still under 
construction and the old ones are not suitable for the modified module.
More verbose explanation and instructions can be found at the linked d.o. 
ticket.

If you'd like to see my plans for testing and more:
http://drupal.org/node/282570

Thanks,

Aron Novak