A design firm that's made HBJ's List of Houston's fastest-growing companies three times in a row has continued its growth by acquiring another firm. Abel Design Group has acquired Ken R. Harry Associates, or KRHA. Founded in 1972, KRHA is a small firm that focuses on high-end corporate interiors, including law and family offices - clients include Houston law firms Vinson & Elkins, Andrews Kurth and Porter Hedges, as well as Schlumberger and Cabot Oil & Gas Corp. Abel Design Group is also known...