Added abstraction WSF_ROUTED, and WSF_FILTERED.

Added under library/server/obsolete/v0 the previous non concurrent friendly version of EWF/WSF, for backward compatiblity.
Removed WSF_CALLBACK_SERVICE and WSF_TO_WGI_SERVICE which are not need with new EWF.

library/server/wsf/router/wsf_routed.e

@@ -0,0 +1,31 @@
+note
+	description: "Object with a `router' feature, used to dispatch url."
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	WSF_ROUTED
+
+feature -- Access
+
+	router: WSF_ROUTER
+			-- Router used to dispatch the request according to the WSF_REQUEST object
+			-- and associated request methods;
+			-- This should not be implemented by descendants. Instead, you gain an effective
+			--  version by also inheriting from WSF_ROUTED_EXECUTION, or one of it's descendants.
+		deferred
+		ensure
+			router_not_void: Result /= Void
+		end
+
+note
+	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Olivier Ligot, Colin Adams, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end