Send the selected notebooks to rails, Ticket0673
But you can't send directly each model since they are circular data structure, jQuery will fail to serialize them
leaving the browser hanging.
So we extract only the relevant field and send that to rails
Only show checkboxes of notebook not yet synced, Ticket0673
If the notebook received from evernote corresponds to a notebook we already have, it will be synced automatically
So no need to put it in the list.
If the list is empty, proceed directly to syncing
Create the notebooks received from Backbone, Ticket0673
Fetch the list of notes corresponding to the chosen notebook from Evernote, Ticket0673