Update restbuck client, create and read an order.

Update JSON converter, the id is not important, applied the DRY principle.
Update the ORDER_HANDLER to use the meta_string_variable instead of meta_variable from req.
Fix, the key in meta_variable_table, use c.key instead of c.item

library/client/http_client/src/http_client_response.e

@@ -41,7 +41,7 @@ feature -- Access
 	raw_header: READABLE_STRING_8
 			-- Raw http header of the response.	
 
-	headers: LIST [TUPLE [key: READABLE_STRING_8; value: READABLE_STRING_8]]
+	headers: HASH_TABLE[READABLE_STRING_8,READABLE_STRING_8]
 			-- Computed table of http headers of the response.
 		local
 			tb: like internal_headers
@@ -86,7 +86,7 @@ feature -- Access
 							from until c <= n and not h[c].is_space loop
 								c := c + 1
 							end
-							tb.force ([k, h.substring (c, l_end)])
+							tb.put (h.substring (c, l_end), k)
 						else
 							check header_has_colon: c > 0 end
 						end
@@ -125,7 +125,9 @@ feature -- Change
 
 feature {NONE} -- Implementation
 
-	internal_headers: detachable ARRAYED_LIST [TUPLE [key: READABLE_STRING_8; value: READABLE_STRING_8]]
+--	internal_headers: detachable ARRAYED_LIST [TUPLE [key: READABLE_STRING_8; value: READABLE_STRING_8]]
 			-- Internal cached value for the headers
 
+	internal_headers: detachable HASH_TABLE[READABLE_STRING_8,READABLE_STRING_8]
+		-- Internal cached value for the headers
 end

library/server/wsf/src/wsf_request.e

@@ -33,7 +33,7 @@ feature {NONE} -- Initialization
 				across
 					l_vars as c
 				loop
-					meta_variables_table.force (new_string_value (c.key, c.item), c.item)
+					meta_variables_table.force (new_string_value (c.key, c.item), c.key)
 				end
 			else
 				create meta_variables_table.make (0)