(i.e. email.test), so move the guts of them here from Lib/test.  The
latter directory will retain stubs to run the email.test tests using
Python's standard regression test.

test_email_torture.py is a torture tester which will not run under
Python's test suite because I don't want to commit megs of data to
that project (it will fail cleanly there).  When run under the mimelib
project it'll stress test the package with megs of message samples
collected from various locations in the wild.

folding.  Note that some of the Japanese tests have changed, but I
don't really know if they are correct or not. :(

Someone with Japanese and RFC 2047 expertise, please take a look!

regrtest framework.  Keep the original standalone-unittest
scaffolding (i.e. suite() and __main__).

non-us-ascii character sets in headers and bodies.  Some API changes
(with DeprecationWarnings for the old APIs).  Better RFC-compliant
implementations of base64 and quoted-printable.

Updated test cases.  Documentation updates to follow (after I finish
writing them ;).