Configure Guard RSpec
Add Turbolinks and the jQuery fix for it
Port application layout to HAML (refs: #10341122659286)
Update Rails to 4.0.3

* Data Injection Vulnerability in Active Record
  (https://groups.google.com/forum/#!topic/rubyonrails-security/Wu96YkTUR6s)
* XSS Vulnerability in number_to_currency, number_to_percentage and
  number_to_human
  (https://groups.google.com/forum/#!topic/rubyonrails-security/tfp6gZCtzr4)