Out with the old and in with the new will ring from one of downtown Grass Valley’s staple restaurants. Kane’s Fine Food in downtown Grass Valley is undergoing renovations that blocked off its front door, but a back entrance can still lead guests into the open restaurant. “We are expanding, and I’m knee-deep in blueprints now,” said John Kane, who co-owns the restaurant with his wife, Maria, also owner of Maria’s restaurant. The renovations involve additions to the patio, which will be partially enclosed, and the bar top, which will expand to twice its current size. “We are taking up …