Rails 4 + bootstrap ensemble des actifs

J'essaye de configurer bootstrap sur Rails4 à l'aide de bootstrap-sass et je suis l'obtention de cette fameuse erreur:

Sprockets::FileNotFound - couldn't find file 'bootstrap'
  (in app/assets/javascripts/application.js:16):

J'ai essayé suivantes:

1. twitter/bootstrap dans application.js
2. gem 'bootstrap-sass', '~> 3.1.0' est à l'extérieur des actifs du groupe
3. Aussi essayé des tas d'autres choses sur internet

J'ai passé beaucoup de temps à prendre différentes suggestions d'autres postes. Comment dois-je systématiquement débogage , comment installer bootstrap-sass ?

p.s:
Également été d'essayer d'obtenir twitter-bootstrap-rails de travail avec pas de chance.

Voici quelques fichiers

application.js

//= require jquery
//= require jquery_ujs
//= require js-routes
//= require bootstrap
//= require_tree .
//= require bootstrap-slider

application.css.scss

 *= require jquery.ui.core
 *= require jquery.ui.theme
 *= require_self
 *= require bootstrap-slider
 *= require_tree .
 *= stub active_admin
*/

@import "bootstrap";

Gemfile

source 'https://rubygems.org'
ruby '2.0.0'
gem 'rails', '4.0.0'
gem 'sass-rails'
gem 'coffee-rails', git: 'git://github.com/rails/coffee-rails.git'
gem 'uglifier', '>= 1.0.3'
gem 'jquery-ui-rails'
gem 'font-awesome-sass'
gem 'less-rails'
gem 'therubyracer', :platform=>:ruby
#gem 'twitter-bootstrap-rails'
gem 'jquery-rails'
#gem 'jquery_mobile_rails'
gem 'js-routes'
gem 'cancan'
gem 'devise'
gem 'figaro'
gem 'haml-rails'
gem 'pg'
gem 'rolify'
gem 'sendgrid'
gem 'simple_form'
gem 'thin'
gem 'rake'

#To use db for storing cookies instead cookie-store
gem 'activerecord-session_store', github: 'rails/activerecord-session_store'

group :development do
  gem 'better_errors'
  #gem 'binding_of_caller', :platforms=>[:mri_19, :rbx]
  #Commenting out platforms part, because may be that's stopping this to be used on the dev machine'
  gem 'binding_of_caller'
  gem 'guard-bundler'
  gem 'guard-rails'
  gem 'guard-rspec'
  gem 'html2haml'
  gem 'quiet_assets'
  gem 'rb-fchange', :require=>false
  gem 'rb-fsevent', :require=>false
  gem 'rb-inotify', :require=>false

  # Required with Rails panel chrome extension. This Gem should come after better_errors gem
  gem 'meta_request'
end
group :development, :test do
  gem 'factory_girl_rails'
  gem 'rspec-rails'
  gem 'pry-byebug'
  gem 'pry-stack_explorer'
  gem 'pry-rails'
  gem 'pry-debugger'
end

group :test do
  gem 'capybara'
  gem 'database_cleaner'
  gem 'email_spec'
end

group :production do
  gem 'rails_12factor'
end

gem 'high_voltage'

#Linkedin Logins
gem "linkedin"
gem "omniauth"
gem "omniauth-linkedin"

gem "omniauth-facebook"

#postgres use hstore in active record
#gem 'activerecord-postgres-hstore'

gem 'state_machine'
gem "ruby-graphviz"


#payments
#gem 'stripe',:git => 'https://github.com/stripe/stripe-ruby'

#gem 'anjlab-bootstrap-rails', :require => 'bootstrap-rails', :github => 'anjlab/bootstrap-rails'

gem 'newrelic_rpm'

gem 'pgbackups-archive'

gem 'pg_search'

gem 'acts-as-taggable-on'

#gem 'activeadmin' , github: 'gregbell/active_admin'
gem "activeadmin", git: "https://github.com/gregbell/active_admin"

gem 'kaminari'
gem 'bootstrap-slider-rails'
gem 'bootstrap-sass', '~> 3.1.0'

OriginalL'auteur codeObserver | 2014-02-03