anjlab-bootstrap，未初始化的常量Bootstrap :: Rails :: Application，Rails 4

Question

@import "twitter/bootstrap";

中包含application.css.scss

//= require twitter/bootstrap

中包含application.js

我的GEMFILE：

source 'https://rubygems.org'
gem 'rails', '4.0.0' 
gem 'pg'
gem 'sass-rails', '~> 4.0.0'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 1.2'

group :doc do
gem 'sdoc', require: false
end

gem 'anjlab-bootstrap-rails', :require => 'bootstrap-rails',:github => 'anjlab/bootstrap-rails', :branch => '3.0.0'