title: Class Carbon\Carbon not found
body: <p>I recently added a package to my Laravel 4 site and now anything that uses Eloquent (or at least Eloquent with any reference to date/time) is showing a 500 error that states:</p>
  
  <pre class="lang-none prettyprint-override"><code>Class 'Carbon\Carbon' Not Found.
  </code></pre>
  
  <p>I tried running </p>
  
  <pre class="lang-none prettyprint-override"><code>composer install
  composer update
  composer dump-autoload
  </code></pre>