core: add basic rule engine, needs celery debugging

passbook/core/apps.py

@@ -1,4 +1,6 @@
 """passbook core app config"""
+from importlib import import_module
+
 from django.apps import AppConfig
 
 
@@ -8,3 +10,6 @@ class PassbookCoreConfig(AppConfig):
     name = 'passbook.core'
     label = 'passbook_core'
     verbose_name = 'passbook Core'
+
+    def ready(self):
+        import_module('passbook.core.rules')