Removed default handler for WSF_ROUTER

Added 	WSF_ROUTE to replace a TUPLE [H, C]
	WSF_ROUTER.route (req): detachable WSF_ROUTE
	WSF_ROUTER.execute_route (a_route, req, res)
	To help usage of Routers
Remove WSF_HANDLER_CONTEXT obsolete features.
Added comments

library/server/wsf/router/wsf_routing_handler.e

@@ -1,6 +1,25 @@
 note
-	description: "Summary description for {WSF_ROUTING_HANDLER }."
-	author: ""
+	description: "[
+					WSF_ROUTING_HANDLER is mainly to group a set of handler having the same base
+					such as /users for 
+						/users/by/id/{id}
+						/users/by/name/name}
+					
+					It can be used to optimize the router, where the router checks only the base path before checking each entries
+					Then for 
+						/a/a1
+						/a/a2
+						/a/a3
+						/a/a4
+						/b/b1
+						/b/b2
+						/b/b3
+					2 routing handlers could be used "/a" and "/b"
+					then to find the /b/b2 match, the router has to do only 
+						/a /b /b/b1 and /b/b2 i.e: 4 checks
+					instead of /a/a1 /a/a2 /a/a3 /a/a4 /b/b1 /b/b2: i.e: 6 checks
+					On router with deep arborescence this could be significant
+				]"
 	date: "$Date$"
 	revision: "$Revision$"
 
@@ -40,11 +59,13 @@ feature -- Execution
 	execute (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
 			-- Execute request handler
 		local
-			hdl: detachable H
+			r: detachable WSF_ROUTE [H, C]
 		do
-			hdl := router.dispatch_and_return_handler (req, res)
-			if hdl = Void then
+			r := router.route (req)
+			if r = Void then
 				res.put_header ({HTTP_STATUS_CODE}.not_found, <<[{HTTP_HEADER_NAMES}.header_content_length, "0"]>>)
+			else
+				router.execute_route (r, req, res)
 			end
 		end
 
@@ -56,14 +77,6 @@ feature {NONE} -- Routing
 
 feature -- Mapping
 
-	map_default (h: detachable H)
-			-- Map default handler
-			-- If no route/handler is found,
-			-- then use `default_handler' as default if not Void
-		do
-			router.map_default (h)
-		end
-
 	map (a_resource: READABLE_STRING_8; h: H)
 			-- Map handler `h' with `a_resource'
 		do