Generate form markup that twitter bootstrap uses with simple_form for Rails 3.1

simple_form_twitter_bootstrap

Relevant Gemfile:
gem 'rails', '3.1.0'

group :assets do
  gem 'coffee-rails', "~> 3.1.0"
  gem 'uglifier'
  gem 'twitter-bootstrap-rails', :git => 'http://github.com/seyhunak/twitter-bootstrap-rails.git' 
end
gem 'simple_form', :git => 'git://github.com/plataformatec/simple_form.git'

Configure simple_form for Twitter Bootstrap:
https://github.com/plataformatec/simple_form/wiki/Twitter-Bootstrap-integration
https://github.com/rafaelfranca/simple_form-bootstrap/blob/master/config/initializers/simple_form.rb

Example app: 
https://github.com/rafaelfranca/simple_form-bootstrap

Example form:
https://github.com/rafaelfranca/simple_form-bootstrap/blob/master/app/views/articles/_form.html.erb