There are plenty of hybrid cars on the road, but hybrid boats?  They haven’t been seen.  Until now.The super-fast, super-sleek 25-foot speedboat uses a combination of electric and diesel engines to produce a low-emission vessel that should warm the hearts of the greenest motorboat sailor. “Everybody knows about hybrid cars, but hybrid boats are different,” said Michael Frauscher, managing director of the company that built the boat. Most air pollution from motor boats comes in the harbor, when the