In the itty-bitty strip mall that backs up on the recently opened Vickery Park Branch Library, you can shop for groceries and other sundry items at Burmese, Ethiopian and Mexican markets. That’s three continents in about 45 feet. Vickery Meadow, as that spice-scented emporium attests, has become the heart of immigrant and refugee life in Dallas. It is a dense and diverse neighborhood, though ...