Fixes for review feedback

jingo/monkey.py

@@ -38,7 +38,7 @@ except ImportError:
     from django.utils.encoding import python_2_unicode_compatible
 
     @python_2_unicode_compatible
-    class StrAndUnicode:
+    class StrAndUnicode(object):
         def __str__(self):
             return self.code
 

run_tests.py

@@ -11,7 +11,7 @@ os.environ['PYTHONPATH'] = os.pathsep.join([ROOT,
                                             os.path.join(ROOT, 'examples')])
 
 if __name__ == '__main__':
-    if django.VERSION[:2] >= (1, 7):
+    if hasattr(django, 'setup'):
         # Django's app registry was added in 1.7. We need to call `setup` to
         # initiate it.
         django.setup()