Add new deps in tox, remove 3.1 support
Small fixes
Import storage modules after configuration in tests
Remove nbsp characters in comments, remove "u" in front of strings
Fix unicode strings in tests for python 2
Fix tests for python2.6
Bugfix: auth PAM doesn't throw an exception when authenticating without username and password
Bugfix: auth PAM check for membership in primary and supplementary groups
Merge pull request #68 from shenek/master

PAM fixes
Style fixes
Update NEWS