Chuck Berry, who with his indelible guitar licks, brash self-confidence and memorable songs about cars, girls and wild dance parties did as much as anyone to define rock ’n’ roll’s potential and attitude in its early years, died on Saturday. He was 90.While Elvis Presley was rock’s first pop star and teenage heartthrob, Mr. Berry was its master theorist and conceptual genius, the songwriter who understood what the kids wanted before they knew themselves. With songs like “Johnny B. Goode” and “Roll Over Beethoven,” he gave his listeners more than they knew they were gett… citeste mai mult