Cherry Red Records has recently been cherry-picking a number of rare treasures from the archives of Purple Records, the label formed by Deep Purple.  Between 1971 and 1979, Purple Records issued music not just from its namesake band, but by other artists both inside (Elf, Hard Stuff) and outside of the hard rock sphere.  Highlights from these albums have been compiled before on a compilation entitled Purple People.  Now, four of the label’s most unexpected offerings have been collected on CD by Cherry Red in a new box set similarly titled Purple…