[New] Added transformation to domain specific object when querying
Now StrolchTransaction.doQuery() returns the result of the
transformation done by the StrolchElementVisitor which is configured on
the ResourceQuery or OrderQuery
[Major] renamed methods
[New] Moved *Visitor transformations in query into query method
This is better than keeping the Visitor in the instance of the query,
where it might be to early to instantiate it.