(Jack Russell terriers in a vignette by Tracy Shue of Walking Olive)     Winterthur expands its salute to craftsmanship and honors its history as farmland with its first artisan market. From 10 a.m. to 4 p.m. July 17-18, 86 vendors, about half from Delaware, will sell antiques and collectibles; furniture and home décor; up-cycled and architectural salvage pieces; crafts …