Family, friends, employees and residents are mourning the loss of a man who fundamentally changed Carson Valley with his prolific and prescient business endeavors as well as his conservation efforts. "Pioneer" was one of many words used this week to describe Don Bently, who died Monday in his Minden home at the age of 87. Other commonly invoked words were "visionary" and "brilliant." "All the employees are obviously very sad," Carlo Luri, general manager of Bently Biofuels, said Tuesday morning. "He did a lot of things for this Valley. He was a pioneer in our business.""He was our local Warren …