Flask-ldap3-login

* Added config item LDAP_CHECK_NAMES with default of True (49). Thanks Morabaraba

- Fixes get_user_groups for dn's with special chars (42). Thanks mofrank
- Add information about SUBTREE for search scope config. Thanks cjchand

Adds support for `LDAP_BIND_DIRECT_PREFIX` to compliment `LDAP_BIND_DIRECT_SUFFIX`. Thanks sysr-q

- Allow custom TLS contexts to be passed to ldap3.Server (23)

- Fixes 17. Thanks cgroschupp

- Flake8 lint all code
- This release fixes 13 - connection.response returns things that are not search result entries.