PLEASANTON, Calif.--(BUSINESS WIRE)--Ellie Mae® (NYSE: ELLI), a leading provider of innovative on-demand software solutions and services for the residential mortgage industry, today announced that author, professor and business management expert Don Tapscott will be among the keynote speakers at the 2015 Ellie Mae Encompass Experience conference on February 22-25 in Orlando, Florida. One of the world’s leading authorities on innovation, media, and the economic and social impact of technology, T