Contributed by David Carrier / It’s difficult to imagine a more effective presentation of Clyfford Still’s work than “A Legacy for Buffalo,” now in the brand-new wing of the Buffalo AKG Art Museum. In four very high, white-walled galleries, the 33 paintings – most of them made between 1937 and 1963 and bearing Still’s distinctly prosaic and thematically unenlightening titles – have room to breathe and provide a full picture of Still’s early development.