Pass all domains through encode('idna') in NICClient
This makes sure that non-ascii domains will be properly encoded in punnycode
before sending the whois query to the server.
{"updated_date": ["10-apr-2006"], "expiration_date": ["14-sep-2011"], "status": ["clientDeleteProhibited", "clientTransferProhibited", "clientUpdateProhibited"], "domain_name": ["GOOGLE.COM", "google.com"], "creation_date": ["15-sep-1997"]}