NASHVILLE — David “Pop” Winans, the patriarch of the famed gospel-singing Winans family, died April 8 with his wife of 55 years, Delores “Mom” Winans, at his side. He was 74. David and Delores Winans met singing gospel in 1950 and were married three years later. David Winans worked as a car salesman, taxi driver, custodian and barber to support…