Issues/375

[AaronTHolt]

Security update, no new features, but many updated packages:

• Update django to 1.11
• Update django-ldapdb to 1.4
  • Sets bytes_mode=False in ldap connection. Requires changing inputs to django-ldap to unicode. Will allow for easier transition for Python3.
    • https://www.python-ldap.org/en/latest/bytes_mode.html#bytes-mode
    • https://github.com/django-ldapdb/django-ldapdb/issues/91
    • https://github.com/django-ldapdb/django-ldapdb/commit/46f474438b952Set's9192c62eefb38e6a211964ae696
• Update djangorestframework to 3.7
• Update python-ldap to 3.2