Revert "Don't call user.is_authenticated"

This reverts commit 73f2dd4.

Author: tpict

setup.py

@@ -16,7 +16,7 @@
     author_email='[email protected]',
     description='A simple, customisable, feature flipper',
     url='https://github.com/mypebble/django-feature-flipper.git',
-    version='0.1.3',
+    version='0.1.2',
     packages=find_packages(),
     license='MIT',
     long_description=LONG_DESCRIPTION,