Sometimes a garden is more than a garden. Sometimes a garden is comfort, safety, job training, real good food for  the hungry and a supportive community. Growing a Garden City by Jeremy Smith (Skyhorse Publishing $24.95) has an all inclusive subtitle - How Farmers,  First Graders, Counselors, Troubled Teens, Foodies, A Homeless Shelter Chef, Single Mothers and More are Transforming Themselves and their Neighborhoods Through the Intersection of Local Agriculture and Community and How You Can, Too. Whew!…