Routing module

[JasperHorn]

It is a bit removed from the core functionality, but it is something I have found myself writing a number of times, and it would be nice to have it centralized and in a place where I can start making improvements to it where it isn't just including files anymore.

On top of that, I could have integration with Storage, which could make it very nice to expose a stored collection, which is a nice way to map REST calls to the real world.