WASHINGTON, 2016-Aug-31 — /EPR Retail News/ — Executives from Google, J.C. Penney, Sephora, Shinola and Houzz will headline the list of speakers next month at Retail’s Digital Summit, the industry’s top networking event for premier technologists, retail executives and 21st Century thought leaders. More than 5,000 retail, e-commerce and multichannel executives will gather to hear…