Small Framework to create a Demo-System

[Thomas Güttler]

If Django would provide a small framework how to create demo-system, this would helpful:

• Developers would waste less time creating fundamental data-structures, just to be able to use a view in the development system

• It would it make easier to onboard a new django developer in a team, since he/she would be familiar with it

• Less teams would copy the production-DB into the development-DB. This is a bad habit since it usually violates data-protection regulations.

There are several ways how to get there here is one idea:

The AppConfig class can provide a method called create_demo_data(). This implements
the creation process. It is up to the developer to implement it (if he wants to).

There is a new management command which calls all AppConfigs.

Of course there are some details not solved yet. For example: how to handle the case where
App2 depends on data of App1.

Would you accept a pull-request?