Change log Tool_table for AIPS++ version 1.9

A summary of the changes is available.

Change-id:  0161
Author:     Ger van Diepen
Date:       2004/11/09
Area:       Tool    table
Category:   New Code
Summary:    addition of CALC command in TaQL

TaQL has been extended with the CALC command. It makes it possible to give an expression on a table and get the result back as a record, vector, or scalar. E.g. vec:=t.calc('sum(FLAG)') See the help on the table tool for more info.