251 279: split settings

See merge request !4

to select the settings that should be used, set DJANGO_SETTINGS_MODULE

https://docs.djangoproject.com/en/2.0/topics/settings/#designating-the-settings

258 283: swap user model

See merge request !6

the user model switched to a custom user model. Therefore the import path of user has changed

highly recommended according to
https://docs.djangoproject.com/en/2.0/topics/auth/customizing/#using-a-custom-user-model-when-starting-a-project

#276 add makefile for django project

See merge request !3

Start project

See merge request !1

262: editorconfig and flake8

See merge request !2

with max_line_length=100