Routing subsystem

[dfarr]

Matchers are registered on an instance of the resonate server and apply to promises. When a promise created matchers are tested in order, the first matcher to signal a match triggers the creation of a task.

Matchers can be used to invoke processes, in contrast to callbacks which are generally used to resume processes.

[flossypurse]

Changed name from "matchers" to "routers". "Routers" accept a promise and return a destination.