- use DRY for code in the methods Article::findByTitleUrl($titleUrl),
  Article::findById($titleUrl)

- own transformation from the model object to the form data, maybe waiting for
  Zend_Form

- transform two-step view plugin and view code into Zend_Layout

- maybe split blog admin controller into SectionAdmin, UserAdmin etc. together 
  with Zend_Acl usage 

