v0.2.0

Implement skip validation by domain for validation_type_for configuration option:

Truemail.configure do |config|
  config.validation_type_for = { 'somedomain.com' => :skip }
end

and

Truemail.configuration.validation_type_for = { 'somedomain.com' => :skip }

1. Added new feature
2. Updated tests
3. Updated documentation
4. Updated wiki
5. Updated gem version to 0.2.0