Changes for version 2.01
- Official release of Business::ISBN to handle ISBN-13
- Does not handle 979- numbers yet (need publisher data for that)
- Does handle 978-numbers, which is the 10 digit ISBN with a different "country code", so it uses the same publisher data
- There are significant API changes to handle the new stuff. It's not so bad, but test it before you rip out the old Business::ISBN stuff.