Minor changes

- using http_client library instead of libcurl directly
 - using implicit conversion to JSON_STRING to improve code readability
 - use ARRAYED_LIST instead of LINKED_LIST .. for performance.
 - cosmetic .. but still a lot of feature clauses are missing, comments, assertions ...

examples/widgetapp/repeater_page.e

@@ -8,11 +8,10 @@ class
 	REPEATER_PAGE
 
 inherit
-
 	BASE_PAGE
-	redefine
-		initialize_controls
-	end
+		redefine
+			initialize_controls
+		end
 
 create
 	make
@@ -22,13 +21,13 @@ feature
 	initialize_controls
 		do
 			Precursor
-			container.add_control (create {WSF_BASIC_CONTROL}.make_with_body("h1","","Repeater Demo"))
+			container.add_control (create {WSF_BASIC_CONTROL}.make_with_body ("h1", ""," Repeater Demo"))
 			create datasource.make_news
 			create search_query.make_autocomplete ("query", create {GOOGLE_AUTOCOMPLETION}.make)
 			search_query.add_class ("form-control")
 			search_query.set_change_event (agent change_query)
 			container.add_control (search_query)
-			container.add_control (create {WSF_BASIC_CONTROL}.make_with_body("h2","","Results"))
+			container.add_control (create {WSF_BASIC_CONTROL}.make_with_body("h2", "", "Results"))
 			create repeater.make_repeater ("myrepeater", datasource)
 			container.add_control (repeater)
 		end