This is great news for the art world. Ghanaian painter, Lynette Boakye Yiadom has reason to laugh all the way to the bank. A painting Lynette did in 2011, The Hours Behind You, was sold for $1,575,000 (including fees) at Sotheby’s. Sotheby’s is one of the world’s largest brokers of fine and decorative art, jewellery, real estate, and collectables. “The …