Added LogoNameSuffix element to Router which handles variable logos for the same supplier

Added guidelines and clarification of the issues related to cached data and price changes

Added support for Visa and Mastercard verification, and 'fake' card verification.

Added 'PassportCountryOfIssue' to possible required parameters.

Added 'SupportedCardList' element which contains the list of supported card types relevant to the booking.

Added to the list of supported card types. See the description of the 'CardType' element.

Reformatted the required parameter list. Various corrections were made to parameter names and definitions to bring them in line with actual system behaviour. Please read through both tables in the RequiredParameter-Name element description. Also see the 'DisplayText' element description.

Clarified the behaviour of the system when the date of birth is not supplied even though it is stated as a required parameter.

Redrafted API spec. Whilst no changes have been made to the API, some extra clarifications/ guidelines/ resrictions have been added and customers are requested to read through any relevant sections - in particular the Integration Guidelines and all other sections of the Detailed Specification

Flight data caching has been optimised so that flight legs quoted in different currencies can be combined to give a return journey from the cache, containing 'mixed currencies'. As a result outward and return legs may now occur with different currencies. This is compatible with the existing specification, however some notes have been added clarifying mixed currencies across legs and also within individual Prices.