Fix tests to pass on Python 3

Fix tests to pass on Python 3

Drop Python 2.6

Restore tests to pass on Python 2.7

Fix missing iteritems on Python 3

Sort imports

Drop Python 3.3

Fix hasattr

Refactor to convert bytes to strings only in utils

Fix i18ndude script location

Fix i18ndude script location
Allow Python 3.4 with extras to fail at Travis

Allow Python 3.4 with extras to fail at Travis

Allow Python 3.4 with extras to fail at Travis