routing tests compiling by providing ugly stubs for everything missing
mark all tests as pendingUntilFixed for now
revise `RequestContext` API and introduce `RouteResult`
+htc resurrect HttpRequest.withEffectiveUri and fix comment
flesh out enough of the infrastructure to make MethodDirectiveSpecs run through (somewhat)
HeaderDirectivesSpecs now working
all PathDirectiveSpecs working
fix all FutureDirectives so that all tests run through
marshalling now Future-based, BasicDirectives testing ok
tests again running through with now 191 succeeded and 139 still pending
fix completing with Future.failed(RejectionError(_))
+hco introduce HttpEntity.withContentType
fix remaining RespondWithDirectivesSpecs