Allow override version when updating example on appspot.com
Latest updates in the readme
Update third party libs in app.yaml to the latest stable versions
Removing foursquare from the homepage. Will get back to it later.
Ignore all secrets.py except for secrets.py.template
Removing data from flash (session cookie).

It contains too big chunk of a data to fit into the cookies
so apparently self.session.add_flash(data) makes webapp2  (or the browser)
silently ignore all the session including authentication.

Removing data leaves enough room in the cookies to store auth session.