1.45    2006-07-06

  - better detection of non-7bit parts
  - don't base64-encode 7bit parts

1.41    2004-12-23

  - Parts can now be automatically created from non-reference strings
    when calling create(), using parts => [], for generating multi-part
    messages. Parts default to 'text/plain' unless they appear to be
    binary, then they're 'application/x-binary'.

1.3    2004-09-25

  - Minor documentation nits.
  - Makefile.PL dependency fixes.

1.1    2004-07-05

  - Initial version.