Adding unittest2 to requirements so we can skip tests on Python 2.6.

django_mailbox/tests/test_integration_imap.py

@@ -1,5 +1,5 @@
 import os
-from unittest import SkipTest
+from unittest2 import SkipTest
 import uuid
 
 from six.moves.urllib import parse

setup.py

@@ -5,6 +5,7 @@ from django_mailbox import __version__ as version_string
 tests_require = [
     'django',
     'mock',
+    'unittest2',
 ]
 
 gmail_oauth2_require = [