Fix parse.py under Py3

[gsnedders]

[gsnedders]

Reading from stdin:

Traceback (most recent call last):
  File "parse.py", line 88, in run
    document = parseMethod(f, encoding=encoding)
  File "/home/gsnedders/Documents/my-projects/OSS/html5lib/html5lib-python/html5lib/html5parser.py", line 223, in parse
    parseMeta=parseMeta, useChardet=useChardet)
  File "/home/gsnedders/Documents/my-projects/OSS/html5lib/html5lib-python/html5lib/html5parser.py", line 87, in _parse
    parser=self, **kwargs)
  File "/home/gsnedders/Documents/my-projects/OSS/html5lib/html5lib-python/html5lib/tokenizer.py", line 40, in __init__
    self.stream = HTMLInputStream(stream, encoding, parseMeta, useChardet)
  File "/home/gsnedders/Documents/my-projects/OSS/html5lib/html5lib-python/html5lib/inputstream.py", line 129, in HTMLInputStream
    raise TypeError("Cannot explicitly set an encoding with a unicode string")
TypeError: Cannot explicitly set an encoding with a unicode string
Traceback (most recent call last):
  File "parse.py", line 221, in <module>
    parse()
  File "parse.py", line 84, in parse
    printOutput(p, document, opts)
  File "parse.py", line 98, in printOutput
    for item in parser.log:
AttributeError: 'HTMLParser' object has no attribute 'log'