v1.40, January 2005
	- the '0' block problem still had survived in functions encrypt and decrypt... fixed
	- some code cleanup
	- changed versioning scheme to be more CPAN-like

v1.3, January 2005
	- no code changes, just some minor documentation update

v1.2, January 2005
	- fixed problems with blocks consisting of a '0'

v1.1, December 2000
	- first release