The Streit's Matzo company is leaving the Lower East Side location where it opened in 1925 and since occupied as a mainstay of a neighborhood of tenements and a sizable Jewish population. One can still walk down Rivington St. and peer through levered windows to see rotating metal racks where the company produces its unleavened bread. Aron Streit founded the matzoh company in 1914, revived it in 1923, and moved it into a red brick......