Fixed Django 1.7 support (again and again).

CHANGELOG.txt

 Changelog
 =========
 
-0.10.0 (16.08.2013)
+0.10.0 (17.08.2013)
 ~~~~~~~~~~~~~~~~~~~
 
  * Support for Django 1.6 and 1.7.

taggit/managers.py

@@ -63,6 +63,10 @@ class ExtraJoinRestriction(object):
             params = self.content_types
         return extra_where, params
 
+    def relabel_aliases(self, change_map):
+        self.alias = change_map.get(self.alias, self.alias)
+
+
 class TaggableManager(RelatedField, Field):
     def __init__(self, verbose_name=_("Tags"),
         help_text=_("A comma-separated list of tags."), through=None, blank=False):
@@ -303,6 +307,7 @@ class TaggableManager(RelatedField, Field):
     def foreign_related_fields(self):
         return [self.related_fields[0][1]]
 
+
 class _TaggableManager(models.Manager):
     def __init__(self, through, model, instance):
         self.through = through