Believe it or not, the flagship Whole Foods at Sixth Street and North Lamar Boulevard was once the center of gravity for much of downtown Austin's daytime social life -- you'd meet friends for brunch there and take visitors from out of town to gawk at the cheese displays. That sounds kind of silly now, but you have to understand how different downtown looked when the store opened in 2005. Although the flagship store's presence on downtown's western edge . . .