Features:
- _Backwards-incompatible_: `Env.read_env` raises a warning instead of
an error when `.env` isn\'t found
([10](https://github.com/sloria/environs/issues/10)). Thanks
[lachlancooper](https://github.com/lachlancooper) for the
suggestion.
- Add optional Django support. Install using
`pip install environs[django]`, which enables `env.dj_db_url` and
`env.dj_email_url`.