in_string should be iterable of data chunks
use byte strings, python3 support
Revert "Django on Python 3 seems to expect responses as strings and not bytes #375 #113"

This reverts commit 825a27cd0b5b0b3af6db3ad6daf379e123fb822c.
Request charset conflicts with xml encoding attribute
email field is mandatory
Merge pull request #376 from DXist/feature/fix_django_for_python3

Feature/fix django for python3