A trio of sister-musicians here in Chattanooga - previously known as “Spinster” - recently took on a new name: “Call Me Spinster.” The sisters are Rachel Graber, Rosalie Graber and Amelia Jacobs - and they describe their work as a melding of “familial harmony and old-timey sensibilities with pop sounds.” Not long ago, “Call Me Spinster” stopped by “Scenic Roots”...