Revert "Workaround for python2.6 bug 7902"

This reverts commit 334073055c.

The real solution is to use python 2.7.

badges/models.py

@@ -1,9 +1,7 @@
-from __future__ import absolute_import
-
 from django.db import models
 from django.contrib.auth.models import User
 import badges.api
-from api.events import user_message
+from caminus.api.events import user_message
 from notification import models as notification
 from django.core.urlresolvers import reverse