Merge 'mssql_money_type' into 'trunk'

r6092@hlagh (orig r7090):  caelum | 2009-07-23 08:24:39 -0400
new branch for fixing the MONEY type in MSSQL
r6093@hlagh (orig r7091):  caelum | 2009-07-23 08:34:01 -0400
add test
r6283@hlagh (orig r7093):  caelum | 2009-07-23 10:31:08 -0400
fix money columns
r6284@hlagh (orig r7094):  caelum | 2009-07-23 10:34:06 -0400
minor change
r6285@hlagh (orig r7095):  caelum | 2009-07-23 11:01:37 -0400
add test for updating money value to NULL
r6286@hlagh (orig r7096):  caelum | 2009-07-23 14:09:26 -0400
add money type tests to dbd::sybase+mssql tests