Default RELATE_EMAIL_SMTP_ALLOW_NONAUTHORIZED_SENDER to True if not configured in local_settings.py, so as to avoid inconsistency.

Adding three configurations: RELATE_USER_FULL_NAME_FORMAT, RELATE_EMAIL_APPELATION_PRIORITY_LIST and RELATE_DISPLAY_USER_FULLNAME_IN_LIST

this was a simple removal of TEMPLATE_*.  Mostly removing redundancy
that was causing the warnings.