Revision history for Perl extension Callback.

0.90.00  Tue Jul 10 10:30:36 2001
	- original version; development and proof-of-concept testing

1.00.00  Wed Jul 11 13:20:00 2001
	- ready for production.  Various bugfixes.  Tests added.

1.00.01  Fri Jul 20 08:58:00 2001
	- some files still referred to Callback instead of Async::Callback.  Whoops.