Add a BinaryField model field

Thanks Michael Jung, Charl Botha and Florian Apolloner for review
and help on the patch.

docs/ref/models/fields.txt

@@ -347,6 +347,22 @@ A 64 bit integer, much like an :class:`IntegerField` except that it is
 guaranteed to fit numbers from -9223372036854775808 to 9223372036854775807. The
 default form widget for this field is a :class:`~django.forms.TextInput`.
 
+``BinaryField``
+-------------------
+
+.. class:: BinaryField([**options])
+
+.. versionadded:: 1.6
+
+A field to store raw binary data. It only supports ``bytes`` assignment. Be
+aware that this field has limited functionality. For example, it is not possible
+to filter a queryset on a ``BinaryField`` value.
+
+.. admonition:: Abusing ``BinaryField``
+
+    Although you might think about storing files in the database, consider that
+    it is bad design in 99% of the cases. This field is *not* a replacement for
+    proper :ref.`static files <static-files> handling.
 
 ``BooleanField``
 ----------------

docs/releases/1.6.txt

@@ -53,6 +53,12 @@ UTC. This limitation was lifted in Django 1.6. Use :meth:`QuerySet.datetimes()
 <django.db.models.query.QuerySet.datetimes>` to perform time zone aware
 aggregation on a :class:`~django.db.models.DateTimeField`.
 
+``BinaryField`` model field
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+A new :class:`django.db.models.BinaryField` model field allows to store raw
+binary data in the database.
+
 Minor features
 ~~~~~~~~~~~~~~