Router scope macro.

[darkofabijan]

Routes scoping discussed in #26.

I have doubts about nesting ResourcesContext and ScopeContext under Context.[Resources|Scope]. I would love to hear your feedback on this and everything else.

[chrismccord]

I'm going through this locally and I don't have much to comment on as it looks really great. :)

I like the approach with the shared Stack module. My initial reaction too was that we could combine both contexts under Context.[Resources|Scope], but after going through the implementation, I agree keeping each context separate is the way to go. I have a few formatting tweaks to make, but it should land in master momentarily. Thanks!