NEW YORK POST --- Owning a Picasso is about to become more affordable — relatively speaking. The artist’s granddaughter, Diana Widmaier-Picasso, is putting her name and talents behind Mene Inc., a jewelry start-up that will sell 24K baubles she will design. Widmaier-Picasso’s jewelry will go on sale in the fall — with a twist: the prices of the items will fluctuate daily based on market price of gold...