Secedgar

Adding functions to easily access the SEC's new REST API! You can read more about the API from the SEC [here](https://www.sec.gov/edgar/sec-api-documentation). The documentation for secedgar on the new rest.py module is [here](https://sec-edgar.github.io/sec-edgar/rest_api.html).

Bringing v0.4.0 out of alpha

Fixes 269

What's Changed
* DOC: Add documentation for NetworkClient by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/230
* TEST: Add test to check user path expanded by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/246
* Fix multiple filing type matches by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/248
* ENH: Add NSAR filing types by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/250
* Process form 4 by darrion in https://github.com/sec-edgar/sec-edgar/pull/254
* Fix-cik-map by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/256
* FIX: Fix caching issue and simplify combo code by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/249
* Fix-url-count by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/251
* TEST: Add Smoke Tests by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/258
* Gh-269 by jackmoody11 in https://github.com/sec-edgar/sec-edgar/pull/270

New Contributors
* darrion made their first contribution in https://github.com/sec-edgar/sec-edgar/pull/254

**Full Changelog**: https://github.com/sec-edgar/sec-edgar/compare/v0.4.0-alpha.2...v0.4.0-alpha.3

- Fix issue where daily CLI command would not work due to `date_cleanup` returning `datetime.datetime` instead of `datetime.date`

- Fixes user agent issues. All filings classes and functions require `user_agent` argument or a `NetworkClient` object with `user_agent` set.