update requests to 2.4.1 and add certifi dependency
remove dist-info files as well
update cachecontrol to version 0.10.3
make it pass
kill ChunkedEncodingError
revert travis change
Dont fallback to sitewide imports
Merge pull request #2024 from kevinburke/requests-2.4.1-try3

Requests 2.4.1