Draft: Add more WDF adaptors

Closes #257

b_asic/__init__.py

@@ -12,3 +12,4 @@ from b_asic.signal import *
 from b_asic.signal_flow_graph import *
 from b_asic.simulation import *
 from b_asic.special_operations import *
+from b_asic.wdf_operations import *