ADd back abstract operation to init file

b_asic/__init__.py

@@ -2,6 +2,7 @@
 Better ASIC Toolbox.
 TODO: More info.
 """
+from b_asic.abstract_operation import *
 from b_asic.core_operations import *
 from b_asic.graph_component import *
 from b_asic.graph_id import *