Fixes for Python 3.5
Fixes for Python 3.5

rsalmaso/django-paypal,spookylukey/django-paypal,rsalmaso/django-paypal,GamesDoneQuick/django-paypal,GamesDoneQuick/django-paypal,spookylukey/django-paypal,rsalmaso/django-paypal,spookylukey/django-paypal