title: The product definition is not pulling in dependencies from the required features
body: <p>I am converting a plug-in-based RCP product to a feature-based one. I have grouped the plug-ins into 4 features and have created a traget definition containing all the required plug-ins.</p>
  
  <p>When I view the dependency lists of each new feature, they look about right but when I run the product, I get a long list of <code>Missing Constraint</code> errors which seem to refer to plug-ins listed the <code>Dependencies</code> of my features.</p>
  
  <p>Do I need to explicitly define these plug-ins as <code>Included plug-ins</code> in each feature definition? Why isn't the project definition itself loading the plug-ins automatically? </p>