Use methode(self, obj) in InlineModelAdmin for use in readonly_fields. see https://docs.djangoproject.com/en/1.6/ref/contrib/admin/#django.contrib.admin.ModelAdmin.readonly_fields
"""
A read-only field can not only display data from a model’s field, it can also display the output of a model’s method or a method of the ModelAdmin class itself.
"""
Merge pull request #169 from fsx999/master

Use methode(self, obj) in InlineModelAdmin for use in readonly_fields.