Moved all *_CONTEXT_* router related classes into wsf_router_context.ecf library

This makes wsf simpler to discover.
And advanced context enabled handler, mapping, ... are still available for now in wsf_router_context.ecf library

library/server/wsf/router_context/wsf_handler_context.e

@@ -0,0 +1,43 @@
+note
+	description: "[
+					Context for the handler execution
+					It provides information related to the matching handler at runtime, i.e:
+						- request: WSF_REQUEST -- Associated request
+					- path: READABLE_STRING_8	-- Associated path
+				]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	WSF_HANDLER_CONTEXT
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make (req: like request; map: like mapping)
+		do
+			request := req
+			mapping := map
+		end
+
+feature -- Access
+
+	request: WSF_REQUEST
+			-- Associated request
+
+	mapping: WSF_ROUTER_MAPPING
+			-- Associated mapping
+
+;note
+	copyright: "2011-2013, Jocelyn Fiat, Javier Velilla, Olivier Ligot, 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