Make it easier to take over existing resources about metacontroller

[glasser]

I see. This really does work exactly like a DecoratorController if you're starting from a clean system (it is the standard DecoratorController demo, after all) — it's just that if you want to bootstrap yourself from a manual implementation to using metacontroller/metac, then you have to jump through some hoops.

[AmitKumarDas]

@glasser looking at this usecase now. I must have missed the notifications.
I would make use of GenericController to handle this usecase. GenericController tries to manage a watch (in this case pod) with any arbitrary attachments (in this case service).

Note that GenericController is not available in this repo since this repo is no longer maintained. It currently available at https://github.com/AmitKumarDas/metac/ (a fork) before we get a proper home for this project.