- Confirm that 500 is the correct HTTP response code to use in case of 
  fallback controller failure.
- Figure out how to return headers from the ezcMvcView::createResponse() 
  method in the ezcMvcResponse struct.
- Figure out a way how to configure the PHP View Handler with a standard
  dirname - similarly to what the Template component does.
- Figure out a way how to configure the view handlers (PHP and Template) with
  a standard directory name - similarly to what the Template component does.
- Support reverse route generation: create an URL from an argument. This
  feature should be available from the router interface.