McDonald's will soon offer in-app food orders and payments

Over the last few years, a number of fast-food and take-out restaurants in the US have launched smartphone apps that allow customers to not only place their order ahead of time, but specify a location for pick-up and even pay in advance. This includes places like Taco Bell, Starbucks, and Dunkin' Donuts. Now the biggest fast-food franchise of them all, …