Merge pull request #198 from bmpenuelas/add_app_name

set app_name in urls.py

Author: PhilipGarnero

rest_framework_social_oauth2/urls.py

@@ -5,6 +5,8 @@
 
 from .views import ConvertTokenView, TokenView, RevokeTokenView, invalidate_sessions
 
+app_name = 'drfso2'
+
 urlpatterns = [
     url(r'^authorize/?$', AuthorizationView.as_view(), name="authorize"),
     url(r'^token/?$', TokenView.as_view(), name="token"),