- Make `python setup.py test work`. remove test/requirements.txt.
fix#154
- Detect if no connection is present, and skip tests if not.
stop-gap measure for issue #147
Given that PEP 0414 was only implemented on 3.3, Python 3
of version 3.2 and prior is not supported, as it would be
cumbersome to add, and 3.2 is used by few anyway.