In a career spanning seven decades, North Carolina native Arthel Lane “Doc” Watson (1923-2012) brought the sounds of Appalachia to the world at large.  A towering figure in Americana, the guitarist was dedicated to the sounds of folk, blues, gospel, bluegrass, and country.  Now, a comprehensive collection will salute his remarkable legacy.  On December 3, Craft Recordings will release Life’s Work: A Retrospective.  The anthology features 101 key tracks from his discography including collaborations with Flatt and Scruggs, Chet Atkins, Ricky Skaggs, Alison Krauss, Bill Monroe, The Nitty Gritty Dirt Band, and…