Create tests for reading compressed tables from S3 URLs
In https://github.com/pandas-dev/pandas/pull/14576, we consolidated compression code and expanded support for compressed URLs. While we added tests for compressed URLs, we did not add tests for compressed S3 files. First, someone will have to upload the compressed tables to Amazon: see https://github.com/pandas-dev/pandas/pull/14587#issuecomment-264674413.

Also tagging https://github.com/pandas-dev/pandas/issues/13137, a pull request which may want to also add these tests.