Though he spent his formative years building his catalog and amassing a following in New York City, St. Augustine-based singer-songwriter David Tashjian (AKA DL is OK) is so Florida, man.  Tashjian’s sonic approach has drawn comparisons to the likes of Mark Knopfler and the War on Drugs’ Adam Granduciel; singular songwriters who deftly reign in a breadth of influences to …