Massachusetts-based Dunkin' Donuts is making it possible for customers to have their coffee to go and never reach for their wallets.  The company has launched its first mobile payment application, allowing customers to use their smartphones or tablets to generate a barcode that can be scanned by cashiers.  The app also allows customers to send virtual gift cards though text, email and Facebook.  The application will be accepted at most of the chain's seven-thousand U.S. locations. (AP)