Adding custom attributes to django model field

[Tom Turner]

I want to add a custom attributes to a Django model field

name = models.CharField(max_length=255, **data_merge=True**)

I want to do this so i can loop round my fields and see if this field is set.

        for field in Project._meta.get_fields(include_parents=False, include_hidden=False):
            if field.extra_info.data_merge:
                   // do something here

I haven't been the first to ask for this see ​https://stackoverflow.com/questions/20679057/adding-custom-attributes-to-django-model-field

If you accept this enhancement I am happy to write a patch, test and documentation. Please let me know.