Microsoft has added support for Apple's Passbook passes in Windows Phone 8.1, which was released today as a developer preview. Microsoft announced this latest version of Windows Phone earlier this month and equipped the mobile OS with digital assistant and Siri competitor, Cortana. As noticed by Tom Warren of The Verge and reported by iMore, Microsoft has created a method that takes the data from a Passbook file and converts it into a card that is imported into Microsoft Wallet. Passbook passes are just collection of data that get rendered into a card and displayed in Apple's Passbook app. Think