proem/proem — pull request #64 by jevens (2012-02-29 11:23:35+00:00)
Title: Feature/improve asset validator

This actually implements the functionality I spoke about in my last pull request and also includes all the code from that request. (it relies on that code so I'm not quite sure how to keep them separately).

At the same time I think this might fix a bug where the validator was calling the service managers has() method instead of provides()