ULG PATCH: Fix render() encoding

[Frederik Kriewitz]

Fixes exceptions like this:
ERROR in CGI: Traceback (most recent call last):
  File "/var/www/html/ulg.py", line 785, in <module>
    handler.index(**params)
  File "/var/www/html/ulg.py", line 722, in index
    print self.renderULGIndex()
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in
position 6254: ordinal not in range(128)
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