ODBCClass.Exec returning single cell result

Now ODBClass.Exec() method senses when a query produced a single row,
single column result set, and returns it to caller. Example: db.Exec(
'SELECT NOW()' ) immediatelly returns the current date/time on a PG
connected ODBCClass object.
.Exec(), .Next() and .Get( colNumber )

DataSet .Exec() method now automatically .Load() the result set;
DataSet .Next() method was skipping the first result set row;
DataSet .Get() method now also accepts column number;