Add basic person data model fields.

biscuit/core/models.py

 from django.contrib.auth.models import AbstractUser
 from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+SEX_CHOICES = [
+    ('f', _('female')),
+    ('m', _('male'))
+]
 
 
 class Person(AbstractUser):
+    additional_name = models.CharField(max_length=30)
+
+    street = models.CharField(max_length=30)
+    housenumber = models.CharField(max_length=10)
+    postal_code = models.CharField(max_length=5)
+    place = models.CharField(max_length=30)
+
+    phone_number = models.CharField(max_length=30)
+    mobile_number = models.CharField(max_length=30)
+
+    date_of_birth = models.DateField()
+    sex = models.CharField(max_length=1, choices=SEX_CHOICES)
+
+    photo = models.ImageField()
+
+    import_ref = models.CharField(max_length=64)
+
     def __str__(self):
         return '%s, %s' % (self.last_name, self.first_name)