The amount of music left behind by groundbreaking funkmaster Prince is, thankfully, good and voluminous. To that end, a newly remastered reissue box set, “Diamonds and Pearls Super Deluxe Edition,” offers his 13th studio album from 1991 with his backing band, The New Power Generation, once again. Out Friday, there are 47 previously unreleased tracks for Prince fans from his vaunted vault, and over two hours of live performance footage.