minor fixes to the setup script
bring trial tests in-process and make its output go to a subunit file
made Tee to a context manager
convert subunit output to junitxml
the testing stuff in setup.py is slowly getting out of hand.
make interpolation in validation error message optional
log invalid object in MessagePack protocol
move Producer in s.s.t.http to its own module.
minor
msgpack transport initial revision
move callbacks in s.s.t.http out of current scope to clean the code up a little.