Django 1.9 compatibility

djangotoolbox/db/utils.py

@@ -1,4 +1,7 @@
-from django.db.backends.util import format_number
+try:
+    from django.db.backends.utils import format_number
+except ImportError:
+    from django.db.backends.util import format_number
 
 
 def decimal_to_string(value, max_digits=16, decimal_places=0):

djangotoolbox/fields.py

@@ -1,12 +1,15 @@
 # All fields except for BlobField written by Jonas Haag <[email protected]>
 
 from django.core.exceptions import ValidationError
-from django.utils.importlib import import_module
 from django.db import models
 from django.db.models.fields.subclassing import Creator
 from django.db.utils import IntegrityError
 from django.db.models.fields.related import add_lazy_relation
 
+try:
+    from django.utils.module_loading import import_string as import_module
+except ImportError:
+    from django.utils.importlib import import_module        
 
 __all__ = ('RawField', 'ListField', 'SetField', 'DictField',
            'EmbeddedModelField', 'BlobField')