title: Add content validation workflow in magento
body: <p>Is there a module or a way to add validation workflow when adding/editing/deleting a product, category or content in magento ? </p>
  
  <p>The idea is to have a editor that edit contents and a validator that sees the content (preview it) and validates it.</p>
  
  <h2>Another feature, is there a way to have 2 versions of the same content : published version and draft version ?</h2>
  
  <p>Another question :<br> 
  If I override CMS Module to add content validation (override the way to access database to put published content and draft content). Is that possible ? I don't know yet how to develop magento modules so that I'm asking the question.<br/>
  Regards</p>