imports e.g. test_support must do so using an absolute package name
such as "import test.test_support" or "from test import test_support".

This also updates the README in Lib/test, and gets rid of the
duplicate data dirctory in Lib/test/data (replaced by
Lib/email/test/data).

Now Tim and Jack can have at it. :)

I left the email pkg alone; I'm not sure how Barry would like to handle
that.

when no arguments are passed

probably *should* be doing.

use it.  This simplifies the individual tests a little.

Added some new tests related to exception handling.

and the information provided to the profiler.  This stuff is a mess!

interpreter is reporting what we expect to see.