Add support for .au

NB AusRegistry does not provide CreationDate or ExpirationDate info and contact info (email address) is only available through web portal at http://whois.ausregistry.com.au/
Add support for .nz

See https://nzrs.net.nz/whois/specification
Merge pull request #8 from mjec/master

Add support for .au and .nz TLDs