Merge branch 'wkd' into 'master'

lib/nickserver/email_address.rb

lib/nickserver/reel_server.rb

lib/nickserver/wkd/Readme.md

lib/nickserver/wkd/source.rb

lib/nickserver/wkd/url.rb

lib/zbase32.rb

test/functional/sample_test.rb

test/support/http_stub_helper.rb

test/unit/email_address_test.rb

test/unit/wkd/url_test.rb

test/unit/zbase_test.rb