America has always been a magnet for talented entrepreneurs. It still is. Keepers of the Dream By Richard Miniter   Dilip Barot, from Gujarat, India, was trained as a pharmacist, but learned within days of landing in the United States that he would have to start at the bottom. He went to work for another Gujarati at a motel in New Jersey for $ 100 a week. A year later he got a job as a pharmacy intern. Then he read in an Indian-American newspaper that the 18-unit Rock Garden in Riviera Beach, Florida, was for sale. The modest motel needed expensive repairs and a hefty down payment...