Install simple_form with Bootstrap support (SLIM version)

simple_form_bootstrap.sh

clubhouse marius$ rails generate simple_form:install --bootstrap
      create  config/initializers/simple_form.rb
      create  config/initializers/simple_form_bootstrap.rb
       exist  config/locales
      create  config/locales/simple_form.en.yml
      create  lib/templates/slim/scaffold/_form.html.slim
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  Be sure to have a copy of the Bootstrap stylesheet available on your
  application, you can get it on http://getbootstrap.com/.

  Inside your views, use the 'simple_form_for' with one of the Bootstrap form
  classes, '.form-horizontal' or '.form-inline', as the following:

    = simple_form_for(@user, html: { class: 'form-horizontal' }) do |form|

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