Cleaned up OAuth 2.0 support fully using Storage() and updating samples.
diff --git a/oauth2client/appengine.py b/oauth2client/appengine.py
index 80c6fab..f35da8f 100644
--- a/oauth2client/appengine.py
+++ b/oauth2client/appengine.py
@@ -25,6 +25,7 @@
from google.appengine.ext import db
from client import Credentials
from client import Flow
+from client import Storage
class FlowProperty(db.Property):
@@ -90,7 +91,7 @@
return not value
-class StorageByKeyName(object):
+class StorageByKeyName(Storage):
"""Store and retrieve a single credential to and from
the App Engine datastore.