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-oct-2006"], "expiration_date": ["03-may-2014"], "status": ["clientDeleteProhibited", "clientTransferProhibited", "clientUpdateProhibited"], "domain_name": ["MICROSOFT.COM"], "creation_date": ["02-may-1991"]}