high level email parsing and manipulation module

 The Courriel class exists to provide a high level API for working with
 emails, particular for processing incoming email. It is primarily a wrapper
 around the other classes in the Courriel distro, especially
 Courriel::Headers, Courriel::Part::Single, and Courriel::Part::Multipart. If
 you need lower level information about an email, it should be available from
 one of this classes.