Description:

Underscore.js & Backbone.js libraries will be included in vendor.
  /vendor/assets/javascripts/underscore.js
  /vendor/assets/javascripts/backbone.js

The generator will create a folder structure for Backbone app.
Separate folders for Models, Views & Routers will be setup.
Underscore & Backbone will be added dependencies in application.js.
Application will be required in the body of application.html.erb.

rails generator backone will create: 
  /lib/generators/backbone/
  /lib/generators/backbone/backbone_generator.rb
  /lib/generators/backbone/USAGE