Ray Dalio says he’s not everyone’s idea of a great boss.  But Dalio, founder of Bridgewater Associates, is starting to look like the Steve Jobs of hedge funds: exacting, infuriating and -- there’s no way to sugarcoat it -- kind of odd. The singular culture Dalio has fostered inside Bridgewater, the world’s largest hedge fund, was on full display Wednesday, when he announced that the man he’d hired to help run his $160 billion firm, and presumably set the stage for a smooth succession, had abruptly departed.   That executive, Jon Rubinstein, knew from tough bosses: he’d worked for Jobs...