FOUR STARS: So (25th Anniversary Deluxe Edition); Peter Gabriel; Eagle Rock: Big time? You bet. Peter Gabriel’s landmark 1986 album, So, a sky-sized achievement in artful pop music, belatedly receives the silver-anniversary treatment, complete with a coffee-table book, two platters of vinyl, a demo disc, a live CD/DVD of a 1987 concert from Athens, and another DVD documentary on the making of the Daniel Lanois-produced album. “I’m on my way,” Gabriel sang at the time, “I’m making it.” He knew what was happening as it happened: Red Rain, Sledgehammer, Don’t Give Up (with Kate Bush), In Your Eyes, That Voice Again and Big Time. The 1980s had much of which to be ashamed. But not this.