Log Message:
py-django-extensions: updated to 2.1.7

Changes 2.1.7:
- New: test, many many more tests :-) thanks everybody
- New: docs, many documentation updates
- New: graph_model, add simple theming support and django2018 theme
- Improvement: ModificationDateTimeField, make modificationfield name modifiable
- Improvement: graph_model, option to not showrelations labels in the graph
- Improvement: reset_db, allow to override list of backends for database engines
- Improvement: reset_db, add psqlextra backend
- Improvement: runserver_plus, idle support
- Improvement: generate_secret_key, removed get_random_string in favour of \ 
get_random_secret_key
- Improvement: update_permissions, add create-only and update-only flags
- Improvement: update_permissions, update changed names of permission to match \ 
correct permission name
- Improvement: syncdata, add --database option
- Improvement: runscript, allow to override RUNSCRIPT_SCRIPT_DIR
- Fix: create_command, fix mknod error on macos
- Fix: runserver_plus, fix in resolving ssl certificate path
- Fix: sqldiff, fix hstorefield
- Deprecate: truncate_letters, use Django's truncatechars
- Deprecate: passwd, use Django's changepassword
- Deprecate: Keyczar encrypted fields, Keyczar is abandonned / deprecated