WSGI deployment causes Internal error

[hodduc]

In EarthReader-Web 2.0, deploying by wsgi (as documented in README.rst) causes following error.

  File "/home/hodduc/.virtualenvs/earthreader/local/lib/python2.7/site-packages/earthreader/web/app.py", line 246, in feeds
    cursor = Cursor(category_id)
  File "/home/hodduc/.virtualenvs/earthreader/local/lib/python2.7/site-packages/earthreader/web/app.py", line 129, in __init__
    with get_stage() as stage: 
  File "/home/hodduc/.virtualenvs/earthreader/local/lib/python2.7/site-packages/earthreader/web/app.py", line 224, in get_stage
    repository = from_url(app.config['REPOSITORY'])
  File "/home/hodduc/.virtualenvs/earthreader/local/lib/python2.7/site-packages/libearth/repository.py", line 104, in from_url
    raise lookup_error
LookupError: cannot find the corresponding repository to :// scheme

When I attached file:// prefix to REPOSITORY argument, It works well.
IMO, get_stage() should automatically choose and add suitable prefix, or simply document should be changed. (First option is more consistent with CLI... maybe?)