0.5 Tuesday 29th April, 2003
    Add iterator interface, plus move the backends to be classes

0.4 Thursday 24th April, 2003
    Add line-ending detection to Email::Folder::MBox
    temporarily disable signing, as it's confusing

0.3 Tuesday 22nd April, 2003
    Just another release of 0.2, now that CPAN repects my authoritay!

0.2 Tuesday 22nd April, 2003
    Lose the (hidden) dependency on UNIVERSAL::require

0.1 Initial version
    Very rough idea