Django-paypal-express-checkout

- Django 1.6 compatibility changes

- Workaround for unicode bug with urllib.urlencode

- updated to factory-boy > 2.0.0

- Making app compatible with Django 1.5 and custom user models
- IMPORTANT: You must add AUTH_USER_MODEL to your settings (if you use the
default, set it to 'auth.User')

- Removed duplicate transaction status

- Improved subtotal column of PurchasedItem admin