title: No 'binary' type with Doctrine 2.4.4
body: <p>I'm trying to use the <code>binary</code> type of Doctrine 2.4.4 using Symfony 2.5.1 as shown in the Doctrine documentation:</p>
  
  <p><a href="http://doctrine-dbal.readthedocs.org/en/latest/reference/types.html#binary" rel="nofollow">http://doctrine-dbal.readthedocs.org/en/latest/reference/types.html#binary</a></p>
  
  <p>With this code:</p>
  
  <pre><code>&lt;?php
  /**
   * @ORM\Table(name="admins")
   * @ORM\Entity(repositoryClass="SG\AdminBundle\Entity\AdminRepository")
   */
  class Admin
  {
      /**
       * @ORM\Column(name="id", type="integer")
       * @ORM\Id
       * @ORM\GeneratedValue(strategy="AUTO")
       */
      private $id;
  
      /**
       * @ORM\Column(name="email", type="string", length=255, unique=true)
       */
      private $email;
  
      /**
       * @ORM\Column(name="password", type="binary", length=64, options={"fixed" = true})
       */
      private $password;
  }
  </code></pre>
  
  <p>And I get this error while executing the command <code>doctrine:schema:update --dump-sql</code>:</p>
  
  <blockquote>
    <p>[Doctrine\DBAL\DBALException]
    Unknown column type "binary" requested. Any Doctrine type that you use has to be registered with <code>\Doctrine\DBAL\Types\Type::addType()</code>. You can get a list of all the known types with <code>\Doctrine\DBAL\Types\Type::getTypesMap()</code>. If this error occurs during database introspection then you might have forgot to register all database types for a Doctrine Type. Use <code>AbstractPlatform#registerDoctrineTypeMapping()</code> or have your custom types implement <code>Type#getMappedDatabaseTypes()</code>. If the type name is empty you might have a problem with the cache or forgot some mapping information.</p>
  </blockquote>
  
  <p>When I check the Doctrine sources at <code>./vendor/doctrine/dbal/lib/Doctrine/DBAL/Types/</code>, there is no such <code>binary</code> type.</p>