Merged in kidmose/pywhois/feature/test-missing-keys (pull request #33)
test_parser.py: Fail on missing keys
{"domain_name": ["GOOGLE.COM", "google.com"], "expiration_date": "2011-09-14 00:00:00", "updated_date": "2006-04-10 00:00:00", "status": ["clientDeleteProhibited", "clientTransferProhibited", "clientUpdateProhibited"], "creation_date": "1997-09-15 00:00:00"}