Fixed README typo.
Fixed README typo.

gabrielhurley/django_openstack_auth,dan1/django_openstack_auth_proto,ashokkumarprajapati/openstack_auth_remote,onsoku/codereview,promptworks/django_openstack_auth,redhat-openstack/django_openstack_auth,ging/django_openstack_auth,gabrielhurley/django_openstack_auth,ging/django_openstack_auth,redhat-openstack/django_openstack_auth,dan1/django_openstack_auth_proto,onsoku/codereview,jamielennox/django_openstack_auth,promptworks/django_openstack_auth