ievv_model_mommy_extras — Add support for more fields types to model-mommy

Model-mommy does not support all the fields in Django. To remidy this, we provide the ievv_opensource.ievv_model_mommy_extras.

For now it only adds support for:

- django.contrib.postgres.fields.ranges.DateTimeRangeField
- django.contrib.postgres.fields.ranges.DateRangeField


To use this, you only need to add it to your INSTALLED_APPS setting:

    # Other apps ...


You only need this for testing, so if you have split out your test settings, you should only add it to INSTALLED_APPS there.