Implemented WSF_RESPONSE.put_error (...) and related

Added WSF_RESPONSE.put_character
Renamed  WGI_OUTPUT_STREAM.put_character_8 as put_character  to follow style of put_string  (and not put_string_8)
Refactored the WSF_DEFAULT_SERVICE_LAUNCHER
Added WSF_DEFAULT_SERVICE to be more user friendly
Splitted the wsf/default/ libraries to have wsf/connector/... and being able to handle more than one connector in the same application

library/server/ewsgi/connectors/cgi/src/wgi_cgi_connector.e

@@ -42,7 +42,7 @@ feature -- Execution
 		do
 			if not rescued then
 				create req.make ((create {EXECUTION_ENVIRONMENT}).starting_environment_variables, create {WGI_CGI_INPUT_STREAM}.make, Current)
-				create res.make (create {WGI_CGI_OUTPUT_STREAM}.make)
+				create res.make (create {WGI_CGI_OUTPUT_STREAM}.make, create {WGI_CGI_ERROR_STREAM}.make)
 				service.execute (req, res)
 			else
 				if attached (create {EXCEPTION_MANAGER}).last_exception as e and then attached e.exception_trace as l_trace then

library/server/ewsgi/connectors/cgi/src/wgi_cgi_error_stream.e

@@ -0,0 +1,57 @@
+note
+	description: "Summary description for WGI_CGI_ERROR_STREAM."
+	legal: "See notice at end of class."
+	status: "See notice at end of class."
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	WGI_CGI_ERROR_STREAM
+
+inherit
+	WGI_ERROR_STREAM
+
+	CONSOLE
+		rename
+			make as console_make
+		end
+
+create
+	make
+
+feature {NONE} -- Initialization
+
+	make
+		do
+			make_open_stdout ("stderr")
+		end
+
+feature -- Error
+
+	put_error (a_message: READABLE_STRING_8)
+		do
+			put_readable_string_8 (a_message)
+		end
+
+	put_readable_string_8 (s: READABLE_STRING_8)
+			-- Write `s' at end of default output.
+		local
+			ext: C_STRING
+		do
+			if s.count > 0 then
+				create ext.make (s)
+				console_ps (file_pointer, ext.managed_data.item, s.count)
+			end
+		end
+
+note
+	copyright: "2011-2011, 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