Apple announced that Burberry CEO Angela Ahrendts will be the company’s new head of retail, joining Apple in the newly created position of Senior Vice President of Retail and Online Stores. As the title suggests, Ahrendts will both oversee Apple retail and online stores, taking her position in the spring. The hiring has ended a long vacancy at the position — former retail chief John Browett left in late October 2012 following a brief but tumultuous…