Encourage using Rails for API development

Summary
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* Update rails to 4.0.11
* remove haml
* remove simple form
* remove jquery rails
* remove konacha
* remove capybara
* remove poltergeist
* remove launchy
* remove headless
* remove fdoc
* remove anything related to assets
* remove better errors
* remove guard konacha
* add prmd
* add json spec
* add pry and binding of caller
* update readme