Revision history 

1.00  Sat Sep 14 2002
	+ Add write_xls() method 
	+ Get column information in database agnostic manner
	+ Add some actual tests

0.08  Sat Sep 14 2002
	+ added 'restrict_rows' and 'columns_wanted' (from Drew Taylor)

0.07  Wed Sep 11 2002
	+ added Oracle query (from Hans Poo & Daniel Mercado)

0.06  Wed Feb 20 2002
	+ Bugfix on Pg subclass

0.05  Wed Feb 20 2002
	+ tweak PostgreSQL query (from Thomas Mason)

0.04  Fri Dec 28 2001
	+ added PostgreSQL query (from Thomas Mason)

0.03  Mon Aug 27 2001
	+ added Sybase query (from Matt Sanford)
  - split out common code to column_finder.pm

0.02  Fri Aug 24 2001
	+ split MySQL-specific code out

0.01  Tue Aug  7 2001
	- original version