AttributeError: 'Stop' object has no attribute 'feedid'

[ustroetz]

After running the following command:

 python -m transitland.bootstrap --url http://www.vbb.de/de/datei/GTF_VBB_Dez2014_Dez2015.zip --feedname berlin-brandenburg_germany  

I get the following output:

Downloading: http://www.vbb.de/de/datei/GTF_VBB_Dez2014_Dez2015.zip
Loading feed: /var/folders/_k/bl71qf5x6vl932642r4g9w9c0000gn/T/tmp0bOZSj.zip
Traceback (most recent call last):
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/local/lib/python2.7/site-packages/transitland/bootstrap.py", line 57, in <module>
    feed.bootstrap_gtfs(f)
  File "/usr/local/lib/python2.7/site-packages/transitland/feed.py", line 83, in bootstrap_gtfs
    stop = Stop.from_gtfs(gtfs_stop, feedid)
  File "/usr/local/lib/python2.7/site-packages/transitland/entity.py", line 83, in from_gtfs
    entity.add_identifier(gtfs_entity.feedid(feedid))
AttributeError: 'Stop' object has no attribute 'feedid'

The feed itself is valid. Maybe I am missing a parameter to generate the feedid. Maybe one of you guys can have a look at it?