By Dan Burns and Akane Otani NEW YORK (Reuters) – If history is any guide, investors who miss out on getting a slice of Alibabas massive initial public offering may want to think twice about jumping into the stock once it hits the New York Stock Exchange. A Reuters analysis of the previous 15 largest IPOs of all time shows that beyond a first-day pop, the first years performance for most of these mega deals was a major flop. …