Google Analytics does not do the right thing for segments
I'm getting an error with the segment option now.  When I go to the query explorer, my segments look like this: "gaid::707967480"
http://ga-dev-tools.appspot.com/explorer/

So the error I'm getting is related to that string construction - is this a bug, or is this somehow my segment ids?
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-9-7b6938ee12f2> in <module>()
----> 1 df = ga.read_ga(['pagePath', 'date'], dimensions=['avgTimeonPage'], start_date='2012-09-01', segment=['742193199'], secrets='./client_secrets.json')
      2 df

C:\Python27\lib\site-packages\pandas-0.10.0-py2.7-win32.egg\pandas\io\ga.pyc in read_ga(metrics, dimensions, start_date, **kwargs)
     94     reader = GAnalytics(**reader_kwds)
     95     return reader.get_data(metrics=metrics, start_date=start_date,
---> 96                            dimensions=dimensions, **kwargs)
     97 
     98 class OAuthDataReader(object):

C:\Python27\lib\site-packages\pandas-0.10.0-py2.7-win32.egg\pandas\io\ga.pyc in get_data(self, metrics, start_date, end_date, dimensions, segment, filters, start_index, max_results, index_col, parse_dates, keep_date_col, date_parser, na_values, converters, sort, dayfirst, account_name, account_id, property_name, property_id, profile_name, profile_id, chunksize)
    283 
    284         if chunksize is None:
--> 285             return _read(start_index, max_results)
    286 
    287         def iterator():

C:\Python27\lib\site-packages\pandas-0.10.0-py2.7-win32.egg\pandas\io\ga.pyc in _read(start, result_size)
    279             except HttpError, inst:
    280                 raise ValueError('Google API error %s: %s' % (inst.resp.status,
--> 281                                  inst._get_reason()))
    282 
    283 

ValueError: Google API error 400: Invalid value 'ga:742193199' for segment.
