Changes Crossroads Music/Pisgah Ridge Gaylon and Katrina Harper and their musical whiz kids, Dalton, Dillon and Hannah, would like to introduce themselves to you on their Crossroads Music debut, “Changes.” Here’s the thing — they all pick and sing. There are no soundtracks, no stacks — just singing and playing.  The Dave Williford song, “Born to Sing,” features Gaylon pickin’…