Also relates with issue [#68 of impresso-pycommons](https://github.com/impresso/impresso-pycommons/issues/68). `impresso_essentials.io.s3` has been tests, but some need refactoring/redefining. Along with that, all other modules need tests.
Also relates with issue #68 of impresso-pycommons.
impresso_essentials.io.s3has been tests, but some need refactoring/redefining.Along with that, all other modules need tests.