routing: big refactor, should be easier to use (simpler types exposed)
routing: Rename RouteType.Const->RConst; RouteType.PF->RFunc
routing: RouteType scaladocs, RFunc alias, unseal Sitelet, RouteType cannot be instantiated
routing: little scaladoc typo
routing: another doc typo
build: sonatype snapshots http*s*, sbt.version=0.13.{1->5}
core: Add Applicative typeclass, limitless builder, and Signal instance
core: Deprecate `nonblocking`, replace with `async` (uses Futures)