Introduce User model
Add Devise to User
Add sample controller and add require logged in user
Configure devise permitted parameters for User
Remove turbolinks from javascript application file
Add devise scoped views for user
Change Ruby version to 2.1.0, latest and greatest
Remove turbolinks from application layout
New styles for signin and signup pages
Creates new dashboard controller, removes sample
Adds layout incl. dashboard's header and navigation bar
Add gem for Backbone and Marionette, plus javascript include tag and related require statements in the application.js file