v0.12.4
Merge branch 'v0.12.x' of https://github.com/PythonCharmers/python-future into v0.12.x
Add future.utils.encoding from django.utils.encoding.
Use the native stdlib by default (Py2 stdlib on Py2) for import hooks
Mark utf-16 as a known-failing case with the newstr.encode(..., 'surrogateescape')