June 9 (Reuters) - Dutchman Joost Luiten shrugged off a one-hour weather delay to win the Austrian Open by two shots on Sunday and celebrate his second victory on the European Tour. The 27-year-old led the field at Atzenbrugg from the second day, and carried a three-shot lead into the final round. He twice saw his lead trimmed to a single shot during his one-under-par round of 71 and had to contend with the delay due to the threat of lightning when at the 14th hole. That failed to put the world number 137 off his game and he can now expect to climb into the top 100 on Monday. ... More...