Everyone has heard of an artist-in-residency program, but a chef-in-residency program is still a relatively new notion. That did not stop the Oxbow Public Market — a neighborhood marketplace in downtown Napa, Calif., that is filled with eclectic local food vendors and artisan craft retailers — to embrace the idea by offering shorter term three- to six-month leases to any restaurateur interested in testing out a new dining concept within its space. More