notice of api change

doc/CHANGES.txt

@@ -37,6 +37,7 @@
 	neko, cpp, php : added Sys class, sys.io and sys.net packages and "sys" define
 	all : allow to access root package with std prefix (std.Type for example)
 	all : added haxe.EnumFlags
+	sys : io.File.getChar/stdin/stdout/stderr are now in Sys class
 
 2011-09-25: 2.08
 	js : added js.JQuery