Customers stand in line at the world-famous Franklin Barbecue in Austin. (Photo ©Tom Fox( Yes, public transportation and a solid workforce are important, but don’t overlook the Amazon BBQ factor as the online shopping giant decides where to put its much heralded, and much sought after, second headquarters, HQ2. After reviewing the list of 20 finalists that Amazon recently released, the Posse thinks world class barbecue might just give an edge to Austin. A total of nearly 240 communities made bids to Amazon, based in Seattle. There is obviously great barbecue in the city of Austin, including Franklin Barbecue. But…