title: Creating/updating schema from Doctrine entities
body: <p>I'm using Doctrine with Zend Framework. I have to create both the DB schema and the Doctrine entities with annotations.</p>
  
  <p>Since the annotations already contain the information, it should be possible to create/update the schema based on them. I don't want to reinvent the wheel, so I was wondering whether that kind of logic already existed?</p>