Python3 installation fix

I'm trying to install this library with python 3 (it is listed in settings.py), but pip installation fails with:

      File "/home/puzz/pyenv/py3/lib/python3.2/site-packages/docs/conf.py", line 51
        project = u'django-browserid'
                                    ^
    SyntaxError: invalid syntax

This is just a trivial installation fix.