Added ResourceId to PlayersearchParameters

Hi,

added ResourceId to Playersearchparameters. 

I just copied the CalculateBaseId-Method from AuctionInfo Class, because of in case you try to find auctions via playersearch you don't have any AuctionInfo objects, so usually you get these objects from the playersearch.
I'm sure you know a better method than I to implement for the method for both use-cases ;)

I tested it and it works like a charm for now.