Every week, it seems, there's a new business on the block -- or one that has shuttered for good. Patch aims to help keep you in the know about what's new and what's gone. Goodbye, Blockbuster: The video store at 1175 South Hairston Road closed its doors yesterday.  Hello, Aunt Ruby's Treats: this relatively new cafe is inside the Shell station at 1535 Lilburn-Stone Mountain Road. The cafe has subs, homemade soups, Jamaican patties and other Caribbean pastries. The pastries and bread are made daily.  There are a number of new businesses in Stone Mountain village, including ABC Consignment, The…