0.14    Fri Mar 03 08:01:32 CET 2006
    - add all_users method

0.13    Sat Nov 26 04:18:19 CET 2005
    - works if you don't have Crypt::PasswdMD5 or Digest::SHA1
    - auto-detects available modules for default check_hashes
    - added Yuval Kogman as author, also added license to POD

0.12    November 10 2005
	- extra_info is now an array, as suggested by Uwe Voelker
	- changing the username will now delete the old username and add the new one

0.11    November 09 2005
    - implement locking with IO::LockedFile
    - minor code and pod cleanups

0.10    November 09 2005
    - initial release