Updated example to use DjangoDbToolConf?

[jonespm]

Do you have any updated example of this code to use the newerpylti1p3.contrib.django.DjangoDbToolConf rather than having to define the json file?

I was going to start another app based on this pattern and figured if you didn't I might just update this example as a better starting point. Hasn't seemed like a lot to add, there's just no default database configuration built into this.

Thanks!