- Update to version 0.5.9:
* avoid error with latest flake8 about unused variable
* allow running tests with python3

- Update to version 0.5.9:
* second place where zip file handling can crash
- enable test suite

- Update to version 0.5.9:
* avoid crashes due to false is_zipfile() response
* Add python-flake8 to test suite package list
* Fix indentation of condition
* Fix basename to match documentation (#54)
* Add build-dependency on flake8 to fix Debian builds