add a C library for mime/rfc822 parsing: This package allows you to decode
multipart mime messages. I wrote this so that my cgiparse libary can
understand multipart/form-data. I was looking at the various ways of doing it
with out designing an entire library. After thinking about the problem, there
were to many edge cases, and designing an entire library would be better. This
is the results of the work. It definately could use some cleaning up.