Added visitor patterns to WSF_VALUE

Handling UTF-8 unencoding for WSF_VALUE ...
Added WSF_TABLE_VALUE to handle list[]=a&list[]=b ...

Library encoder: added UTF8 facilities

library/server/wsf/tests/src/test_wsf_value.e

@@ -0,0 +1,23 @@
+note
+	description: "Summary description for {TEST_WSF_VALUE}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	TEST_WSF_VALUE
+
+inherit
+	EQA_TEST_SET
+
+feature {NONE} -- Events
+
+	test_table
+		local
+			tb: WSF_TABLE_VALUE
+		do
+			create tb.make ("table")
+			assert ("Ok", True)
+		end
+
+end