Start of headers, and <5xx responses.
More notes, docs, placeholders.
Typos be defeated!
Passes through headers, returns status code for all <500 responses, with tests.
Pep8, with test!
Adds pep8 to reqs
Merge pull request #3 from greenkahuna/feature/adds-headers-and-other-codes

Return headers, status code, and all responses < 5xx.