Fix adapters from json definitions being ignored.
Merge pull request #203 from linrock/fix-options

Fix adapters from JSON definitions being ignored.
Convert options to Symbol when loading the JSON.

Alternative solution to GH-203.
.SA host should be whois.nic.net.sa (GH-29)
Remove support for Ruby-based definitions
Add arin adapter to handle ReferralServer directives (fixes #37).
Add specs and fixtures for the arin adapter.
whois.eu parser now recognizes throttled responses
Regenerate gemspec
Fixed parsing of nameservers on register.com
When there were four nameservers listed, followed by a "blank" nameserver,
the parser would mistakenly include the blank line and the dates following it.
Merge pull request #207 from stormsilver/fix-registercom

Fixed parsing of nameservers on register.com
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
Code cleanup
whois.nic.kz crashes when last update date is blank.
whois.nic.cz crashes when keyset node is present in the whois response.
Update fixtures
Update .us fixtures
Added full whois.nic.us, whois.nic.travel, and whois.nic.tel parsers.