Address Input interface changes

This release includes a change to the serialization of the country information within an Address. The country is now found under the key countryCode as opposed to the old country.

Addresses now follow:

{
  address1: React.PropTypes.string,
  address2: React.PropTypes.string,
  city: React.PropTypes.string,
  state: React.PropTypes.string,
  postal: React.PropTypes.string,
  countryCode: React.PropTypes.string
}