Ultracool singer, songwriter and multi-instrumentalist Rebecca Haviland and her band Rebecca Haviland and Whiskey Heart just shared a twangy new single with a touch of soul to get ready for those late summer night drives, “Hideaway.” Rebecca’s big vocals and intimate songwriting à la Brandi Carlile and Kacey Musgraves front her band made up of Todd Caldwell (Crosby, …