Added pya compatibility module

src/pymod/distutils_src/pya/__init__.py

@@ -0,0 +1,10 @@
+
+import klayout
+import importlib
+
+__all__ = []
+for m in klayout.__all__:
+  mod = importlib.import_module("klayout." + m)
+  for mm in mod.__all__:
+    globals()[mm] = getattr(mod, mm)
+