Add Importer.enum convenience attribute

rattail/importing/importers.py

@@ -84,6 +84,7 @@ class Importer(object):
 
     def __init__(self, config=None, fields=None, key=None, **kwargs):
         self.config = config
+        self.enum = config.get_enum()
         self.fields = fields or self.supported_fields
         if key is not None:
             self.key = key