LEWISTON, Maine, Oct 28 (Reuters) – A U.S. Army reservist accused of spraying a bowling alley and bar with gunfire in Lewiston, Maine, killing 18 people, was found dead from a self-inflicted gunshot wound in a recycling plant trailer after a 48-hour manhunt, police said on Saturday.The body of Robert R. Card, 40, was discovered on Friday night at a…