Todo:
-----
$Id$
Methods to implement:
- AddMemberMessage
- AddOrder
- AddShipment
- GetAdFormatLeads
- GetAttributesCS
- GetAttributesXSL
- GetCategory2CS
- GetCategory2FinanceOffer
- GetFinanceOffers
- GetMemberMessages
- GetNotificationPreferences
- GetOrders
- GetProductFamilyMembers
- GetProductFinder
- GetProductFinderXSL
- GetProductSearchPage
- GetProductSearchResults
- GetProductSellingPages
- GetRecommendations
- GetSellerEvents
- ReviseCheckoutTransactionDetails
- ReviseShipment
- SetNotificationPreferences
- SetPromotionRules

Wrapper Methods:

These methods are not available for the API, but can be
created as simple wrappers:

- GetTransaction(ItemId, TransactionId)
- GetInvoice(Year, Month, PageNumber)

Refine these methods:

- GetAccount()

Methods on Models:

Transaction:
 - AddDispute()