add TAP writer for Python's unittest module and the more advanced nosetests plugin, from https://github.com/cpackham/tappy, commit d9d9fb1aae97260974191a5a44d605da0721346d, license GPLv2 (but not part of our production code - only for tests)
incorporate features of nosetest plugin into the unittest TAP writer
write normal unittest output to stderr and TAP output to a file
add a method that is a drop-in replacement for unittest.main (but with TAP output)
add TAP support for python-ctemplate tests