Since 1968, Trojan Records has been synonymous with the reggae, rocksteady, dub, and ska genres.  The U.K. label founded by Lee Gopthal and Island Records’ Chris Blackwell was instrumental in spreading those Jamaican sounds throughout the world and popularizing such key artists as Jimmy Cliff, Desmond Dekker, Lee “Scratch” Perry, and The Maytals.  By 1971, Trojan – with its focus on 45 RPM singles – had amassed enough hit records to release a label anthology.  On June 18, that seminal release, The Trojan Story, will receive a reimagined 50th anniversary reissue from…