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": ["28-mar-2008"], "expiration_date": ["04-jan-2016"], "status": ["clientTransferProhibited"], "domain_name": ["IMDB.COM", "IMDB.COM"], "creation_date": ["05-jan-1996"]}