test/unit: fix all pep8 errors
test/unit: fix all pyflakes errors
tox.ini: run pep8/pyflakes on `test` package also

This is done so that we also ensure good style in our test code.
test/unit: better multiline string style
added doc changes for `script` channel

added the `script` channel to Servlet docs
Merge pull request #90 from pkit/script

added doc changes for `script` channel
Merge pull request #88 from larsbutler/test-code-pep8-and-pyflakes

Fix pep8 and pyflakes errors in test code