ULG PATCH: Fix render() encoding

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)