Added notion of mapping factory, so one can implement a handler without having to implement new_mapping

Added filter context handler
Added WSF_STARTS_WITH_ROUTING_HANDLER and WSF_URI_ROUTING_HANDLER (in addition to the uri template version)

library/server/wsf/router/support/uri/helpers/wsf_uri_routing_handler.e

@@ -0,0 +1,29 @@
+note
+	description: "Summary description for {WSF_URI_ROUTING_HANDLER}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	WSF_URI_ROUTING_HANDLER
+
+inherit
+	WSF_ROUTING_HANDLER
+
+	WSF_URI_HANDLER
+
+create
+	make,
+	make_with_router
+
+note
+	copyright: "2011-2012, Jocelyn Fiat, Javier Velilla, 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