ALLISON PARK, Pa. (AP) — Should the hanging from Thailand stay on the living-room wall where it has lived since I was born? Should we lay out the family room as it was when I was 8, when I was 17 or in a completely new configuration? Should we leave my mother’s spice rack on the north wall of the kitchen? What about the spices? When you live in a house passed down over generations, deep-time design opportunities lurk around every corner. There are so many ways to blend past and present. And the weight of history can rise up and knock you down at the most unexpected moments. In…