switched to relative import of social so it works in python3

[rtrajano]

I'm not entirely sure if the whole project will work in Python3 but this import was stopping me from loading the module in Python3.

[rdegges]

Thank you, we should have been doing this anyhow.

[rdegges]

Just cut a new release with this included. Thanks a ton =)

[rtrajano]

thanks! now i can remove this silly entry from my requirements file -e git://github.com/rtrajano/stormpath-django.git#egg=stormpath-django-master

[rdegges]

=)