Add documentation and source

Added documentation, source and extra files.

source/translation/birds/models/bird.py

@@ -0,0 +1,22 @@
+from uuid import uuid4
+
+from django.db import models
+from django.utils.translation import gettext_lazy as _, pgettext_lazy
+
+
+class Bird(models.Model):
+    """
+    Bird definition.
+
+    """
+
+    uuid = models.UUIDField(default=uuid4, verbose_name=_("UUID"))
+    vernacular_name = models.CharField(max_length=64, unique=True, verbose_name=_("vernacular name"))
+    scientific_name = models.CharField(max_length=64, unique=True, verbose_name=_("scientific name"))
+    weight = models.PositiveIntegerField(default=100, verbose_name=_("weight"))
+    is_extinct = models.BooleanField(default=False, verbose_name=pgettext_lazy("bird (adjective)", "extinct"))
+
+    class Meta:
+        verbose_name = _("bird")
+        verbose_name_plural = _("birds")
+        app_label = "birds"