Update CHANGELOG for GH-207
Revert "Fixed parsing of nameservers on register.com"

The fixture contains Verisign and Register.com response.
Also, I was unable to find a blank nameserver on the fixture and the online whois response for bar.com is different.

This reverts commit 7db1a9056473a2888b1319f241722bf8cd79b929.
Regenerate gemspec