Introduce parser for new .co.za WHOIS
Remove old coza whois support
Update code documentation
Tidy up registered method
Tidy up method internals
Tidy up method internals part 2

* Use Array.wrap - remove registered? as a guard condition
Remove all the RSpec pretty

* Also tweak available? to return false instead of false-y
Test unsupported methods on all specs
Use Time.parse - remove timezone
Reorder methods
Strings instead of symbols in scanner
Simplify scanner
Update fixtures
Add full whois.dns.pl parser
kero.yachay.pe parser now recognizes throttled responses
Update whois.sx parser to the new response format.
whois.sx should understand premium names

See http://openregistry.com/clearinghouse-intellectual-property
$ bundle update gemspec
Update whois.cnnic.cn parser to the new response format.
whois.nic.lk crashes when the creation date is 'null'.