[SQLObject] Accumulate Select results

[Philippe N. <sw...@fr...>]

Hi,
 
Here is the patch resulting from previous thread called 'SUM'. I've
coded the behaviour for count() and sum() methods. But max(), min()
and friends should be trivial too :)

There also are few tests in SelectTest t-unit (may there be more, but
this is the basis for now).

-- 
Philippe Normand