0.25 Wed Aug 23 01:25:36 EDT 2006
    - The last release was...ill-considered and missing a "defined"

0.24
    - Quiet down a warning on expirey

0.23 Tue Jan 18 08:31:03 EST 2005
    - Switch to fetch/store instead of fetch/set (recommended by Ruslan)
      (Also support get/set as aliases)

0.22
    - Minor doc fixes
    - Try harder not to invoke "expire" multiple times in the same second.