Adventurous foodies are likely familiar with the concept of snout to tail dining, which incorporates the entire animal -- even the exotic bits -- into recipes that stray from the norm. Soon enough, OpenTable may offer a different take on start-to-finish dining by incorporating payments into its restaurant reservation platform. The system is said to still be in testing, which would require that diners merely open the OpenTable app, select a tip amount and hit the payment button. As a boon to restaurant owners, OpenTable isn't planning on taking a cut from the transaction;