This week on Points North: The foundation of the historic Point Betsie Lighthouse in Frankfort is crumbling. High waters and waves cracked the barrier that protects it from Lake Michigan. Plus, there are not many commercial fishers left in the Great Lakes. In Michigan, they have long been at odds with the state Department of Natural Resources. Now people who catch fish to sell say the state is attempting to put them out of business. Large waves and Lake Michigan’s record high water level is