Python 3 support.
Merge
Move email send out into its own method and other minor refactoring.
Added FORMS_BUILDER_EMAIL_FAIL_SILENTLY setting for controlling fail_silently arg when sending email.
Merge
Added Nikita Shalakov to AUTHORS.
Handle non-date fields being changed to date fields with existing entries.
Admin style tweaks
Screenshots
README tweaks
Fix deprecated depth arg to select_related.