Change from six.u to the old u'' standby

From what I can tell, running six.u to create unicode strings breaks the shit out of Python 2.7. But using Python2's native u'' form seems to work just fine ¯\_(ツ)_/¯

```
  File "/home/kschwen/dev/analysis/construction-permits/repo/permits/models.py", line 79, in geocode_intersection
    print address, search[0]
  File "/home/kschwen/dev/analysis/construction-permits/local/lib/python2.7/site-packages/googlegeocoder/__init__.py", line 66, in __str__
    return self.__unicode__().encode('utf8')
  File "/home/kschwen/dev/analysis/construction-permits/local/lib/python2.7/site-packages/googlegeocoder/__init__.py", line 110, in __unicode__
    return six.u(self.formatted_address)
  File "/home/kschwen/dev/analysis/construction-permits/local/lib/python2.7/site-packages/six.py", line 468, in u
    return unicode(s, "unicode_escape")
TypeError: decoding Unicode is not supported
```