Questions on shelf and shelf_route

I have a few questions on shelf and shelf_route:

- What is the direction on session management? Is that something that shelf
intends to add?
- Related to the above - how will session management interact with the
current HttpServer implementation? I believe it already has minimal session
support (setting DARTSESSIONID)
- For cookie management, are there any enhancements planned, or does one
have to set cookies via headers?

Regarding shelf_route, is possible to have multiple middleware chains that
go down different paths? i.e. If I have middleware A,B and C, and I want
something like

/images - > A -> handler
/foo/* -> A -> B -> handler
everything else -> A -> B -> C -> handler

Hope that makes sense...

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