Adding authentication gems
Fixing reference to omniauth
Added Devise controllers methods and views, bound to Omniauth for Withings
Adding dummy e-mail to substitude for no email coming from withings
Modified users table and account creation protocol to save token and secret from oauth

In order to actually do something useful with oauth credentials, you need to provide these two
items to the referring app. This saves those in the table for later use.
gets data from withings & adds stores it locally. only a proof of concept