backward compat

Author: gotcha

src/collective/big/bang/__init__.py

@@ -2,5 +2,10 @@
 """Init and utils."""
 from zope.i18nmessageid import MessageFactory
 
+import sys
+from collective.big.bang import interfaces
+
+sys.modules['collective.big.bang.interface'] = interfaces
+
 
 _ = MessageFactory("collective.big.bang")