Isabelle Caro, the French model and actress who allowed her skeletal frame to be photographed and placed on billboards as a warning about the dangers of anorexia has died.Caro, who was 28, died on Nov. 17 after a working trip to Tokyo, People.com reports.Her acting coach Daniele Dubreuil-Prevot, Caro's longtime teacher told People that while she didn’t know the exact cause of death, Caro had been…