Updated version to 1.3.2.

Updated status to stable/production.
Added AttributeError exception handling for models that specify a SortableForeignKey that does not inherit from Sortable.
Added template support for nested objects that are sortable by a foreign key, where the foreign key is not sortable.

sample_project/app/tests.py

@@ -8,7 +8,7 @@ from django.test import TestCase
 from django.test.client import Client, RequestFactory
 
 from adminsortable.fields import SortableForeignKey
-from adminsortable.models import Sortable, MultipleSortableForeignKeyException
+from adminsortable.models import Sortable
 from app.models import Category, Credit, Note