title: "No Metadata Classes to process" when trying to create the schema in sf2
body: <p>after doing php app/console doctrine:schema:create I'm getting the
  message "No Metadata Classes to process.".</p>
  
  <p>My steps are just these:</p>
  
  <p>Download sf2, create the bundle Jander/ClarBlundle and create Jander/ClarBundle/Resources/config/doctrine/Jander.ClarBundle.Entity.User.orm.dcm.yml
      with this content:</p>
  
  <pre><code>Jander\ClarBundle\Entity\User:
  type: entity
  table: user
  id:
      id:
          type: integer
          generator:
              strategy: AUTO
  fields:
      name:
          type: string
          length: 255
  </code></pre>
  
  <p>I don't have any problems with doctrine:database:create.</p>
  
  <p>Any idea?</p>
  
  <p>sf2 beta1.</p>
  
  <p>Javier </p>