#8 Add a class for E-Mail Addresses

[Alexander G. M. Smith]

How about making a mail kit class for handling addresses?

That way it could break them up into first / last name /
mailbox and do other tricks (character set encoding for one).
Possibly have another class for a list of e-mail addresses
(which expands them to a comma separated list in the rendered-
to-text format and vice versa if decoding an email address
header).