Business Week – In the 1990s, Macau’s gambling riches sparked bloody gunfights between triad gangsters vying for control of private gaming rooms for China’s wealthy. Today, there’s a new conflict brewing, only this time it’s being waged with private jets, limousines, and million-dollar loans. This latest battle pits casinos against their longtime allies, so-called junket operators that for years have recruited rich gamblers in China, whisked them to Macau, put them up in luxury hotels, and extended interest-free loans to circumvent limits on cash they can take out of the mainland. In the early years after China allowed foreign gaming…