Apple today previewed watchOS 2, the first major software update for Apple Watch, giving developers the tools to build faster and more powerful apps running natively on Apple Watch. Starting today, developers can take advantage of innovative hardware features of Apple Watch including the Digital Crown, Taptic Engine and heart rate sensor, along with software APIs to build new app experiences. Available to Apple Watch users this fall, watchOS 2 also includes new watch faces, third-party app information as watch face complications and new communication capabilities in Mail, Friends and Digital Touch. “We are thrilled with the feedback we’re getting from Apple Watch customers, and after just a few weeks of availability we’re excited for developers…