title: Missing extension in Behat/mink/laravel
body: <p>I'm having a lot of trouble with setting up behat + mink for my laravel project.</p>
  
  <p>The error msg:</p>
  
  <pre><code>PHP Deprecated:  The ability to pass file names to Yaml::parse() was deprecated in 2.7
  and will be removed in 3.0. Please, pass the contents of the file instead. in 
  home/user/projects/php/projectname/vendor/symfony/yaml/Symfony/Component/Yaml/Yaml.php
  on line 58
  
  [Behat\Testwork\ServiceContainer\Exception\ExtensionInitializationException]    
  `Behat\MinkExtensions\Extension` extension file or class could not be located. 
  </code></pre>
  
  <p>My composer.json:</p>
  
  <pre><code>"require": {
      "laravel/framework": "4.2.*",
      "behat/behat": "~3.0.6",
      "behat/mink": "1.6.*",                                                 
      "behat/mink-goutte-driver": "*",
      "behat/mink-selenium-driver": "*",
      "behat/mink-selenium2-driver": "*",
      "behat/mink-sahi-driver": "*",
      "behat/mink-zombie-driver": "*"
  </code></pre>
  
  <p>My behat.yml (located in the root of the project)</p>
  
  <pre><code>default:
      extensions:
          Behat\MinkExtensions\Extension:
              goutte: ~
  </code></pre>
  
  <p>I've tried different versions, but still same error msg.</p>
  
  <p>The commands I've run are:</p>
  
  <pre><code>./vendor/bin/behat --init
  ./vendor/bin/behat
  </code></pre>
  
  <p>But produces same msg.</p>