Director Sam Taylor-Johnson’s “Back to Black” invokes a single question, one fans of Amy Winehouse are sure to recognize: What kind of f*ckery is this? The Camden-bred superstar, played by Marisa Abela, was famously “just one of the girls.” Down to earth, charming, witty, and, when she opened her mouth, a dazzling performer with an unbelievably soulful voice. Infamously, those who remember Amy will also recall a brutal struggle with addiction and leeching media frenzies that followed her to her