Merged in kidmose/pywhois/feature/test-missing-keys (pull request #33)
test_parser.py: Fail on missing keys
{"domain_name": "SQUATTER.NET", "expiration_date": "2008-11-06 00:00:00", "updated_date": "2007-11-07 00:00:00", "creation_date": "1999-11-06 00:00:00", "status": "clientTransferProhibited"}