Added Module Custom Search

Added Google custom search library
Added HTTP client extension libaray
Updated demo example to use the Module Custom Search

modules/auth/cms_authentication_module.e

@@ -123,6 +123,7 @@ feature -- Hooks configuration
 				lnk.set_weight (98)
 				a_menu_system.primary_menu.extend (lnk)
 			end
+
 		end
 
 feature -- Handler