Welcome to this week’s Release Round-Up! Elton John, Jewel Box (EMI/UMe) 8CD: Amazon U.S. / Amazon U.K. / Amazon Canada Deep Cuts 4LP: Amazon U.S. / Amazon U.K. / Amazon Canada Rarities & B-Sides 3LP: Amazon U.S. / Amazon U.K. / Amazon Canada And This Is Me… 2LP: Amazon U.S. / Amazon U.K. / Amazon Canada Elton John is reaching deep into the vault with Jewel Box, a new, super-sized collection of rare and unreleased material.  The British pop legend’s deep dive into his expansive, five-decade-plus archive features 148 tracks on 8 CDs, approximately 63 of which are previously unreleased, plus three dozen B-sides being compiled together for the first time.  The discs are thematically organized as Deep…