Hello, and thank you for sharing and maintaining such a valuable project. I'm just getting started by way of legis-graph and intend to become a frequent user and hopefully a helpful contributor.

I've setup a fresh installation and Python 2.7 virtual environment. As a heads up for potential future congress users, I ran into an SSL handshake issue sourced to scrapelib which prevents execution of the fdsys task (and likely others). That issue and workaround is detailed here.

Currently, I'm attempting to ./run bills --congress=115 and the task fails because there is no data hierarchy in the filesystem yet. mkdir -p data/115 and a subsequent os.listdir call will fail because there are no bill types. This is easy enough to workaround with some knowledge of the expected hierarchy, but it seems like something we could also easily fix.

I see there's a mkdir_p function in utils.py we could reuse - is there a good central place in the codebase to anticipate this edge case? I'd be happy to put together a pull request with a little guidance.

Thanks again for this very useful project!