systematic use of from __future__ import absolute_import. it eliminates import NAME confusion with very common names (eg. import ldap is very ambiguous: can be a ldap module from realms-wiki, a ldap module from flask-ldap-login, or python-ldap module.

also cleant up a bit the import towards PEP8: builtin modules first, then 3rd party python packages, then local packages

realms/config/__init__.py

@@ -1,9 +1,12 @@
+from __future__ import absolute_import
+
 import json
 import os
 import sys
-from urlparse import urlparse
 
-from realms.lib.util import in_vagrant
+from six.moves.urllib.parse import urlparse
+
+from ..lib.util import in_vagrant
 
 
 class Config(object):