move sign in, sign out, create an account to shared user_navigation partial
add before_action :authenticate_user! (devise) on application controller; indent methods below private and protected keywords
skip_before_action authenticate_user! on static pages controller
accounts#index view includes link to edit account
change Sign Up on Devise links to Create an Account
_user_navigation includes a link to dashboard
static_pages home just has welcome message - navigation extracted
spatial changes
rails_admin gem
specify ruby 2.1.2 in .ruby-version
rails_admin gem, not rails-admin