title: laravel install bootstrap with composer not work
body: <p>laravel install bootstrap with composer not work.</p>
  
  <p>I use command</p>
  
  <pre><code>composer require twbs/bootstrap:4.0.0-alpha.6
  </code></pre>
  
  <p>after that. I see file composer.json</p>
  
  <pre><code>"require": {
          "php": "&gt;=5.6.4",
          "laravel/framework": "5.4.*",
          "laravel/tinker": "~1.0",
          "twbs/bootstrap": "4.0.0-alpha.6"
      },
  </code></pre>
  
  <p>It has a folder "twbs" in "vendor"</p>
  
  <p>I try code bootstrap in welcome.blade.php but it did not work.</p>
  
  <p>I do not know if I need any additional config?</p>