Code review comment for lp:~stefanor/ibid/html5lib-524660

Query: exchange 1 usd to zar
ERROR:scripts.ibid-plugin:Exception occured in Currency processor of conversions plugin
Traceback (most recent call last):
  File "/home/marco/ibid/html5lib-524660/scripts/ibid-plugin", line 129, in <module>
    processor.process(event)
  File "./ibid/plugins/__init__.py", line 119, in process
    method(event, *match.groups())
  File "./ibid/plugins/conversions.py", line 368, in exchange
    self._load_currencies()
  File "./ibid/plugins/conversions.py", line 303, in _load_currencies
    etree = get_html_parse_tree('http://www.xe.com/iso4217.php', headers=self.headers, treetype='etree')
  File "./ibid/utils/html.py", line 55, in get_html_parse_tree
    namespaceHTMLElements=False)
TypeError: __init__() got an unexpected keyword argument 'namespaceHTMLElements'