webvulnscan fails on Python 3

Running against vulnsrv:
python3 -m webvulnscan http://localhost:8666/
Traceback (most recent call last):
  File "/usr/lib/python3.3/runpy.py", line 160, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python3.3/runpy.py", line 73, in _run_code
    exec(code, run_globals)
  File "./webvulnscan/__main__.py", line 18, in <module>
    webvulnscan.main()
  File "./webvulnscan/__init__.py", line 103, in main
    messages = run(options, arguments)
  File "./webvulnscan/__init__.py", line 82, in run
    attack(client, log, page)
  File "./webvulnscan/utils.py", line 125, in run
    cls.attack(client, log, *s)
  File "./webvulnscan/attacks/xss.py", line 47, in xss
    globals()['attack_' + target_type](client, log, *args)
  File "./webvulnscan/attacks/xss.py", line 18, in attack_post
    attacked_page = form.send(client, parameters)
  File "./webvulnscan/form.py", line 42, in send
    return client.download_page(self.action, parameters)
  File "./webvulnscan/client.py", line 87, in download_page
    url_or_request, parameters, req_headers)
  File "./webvulnscan/client.py", line 79, in download
    return self._download(request)
  File "./webvulnscan/client.py", line 38, in _download
    response = self.opener.open(request)
  File "/usr/lib/python3.3/urllib/request.py", line 467, in open
    req = meth(req)
  File "/usr/lib/python3.3/urllib/request.py", line 1179, in do_request_
    raise TypeError(msg)
TypeError: POST data should be bytes or an iterable of bytes. It cannot be of type str.
hhucn / webvulnscan

webvulnscan fails on Python 3 #62
