update language data, blocks and items

data/lang/downloader.go

@@ -79,7 +79,8 @@ func lang(name, hash string, size int64) {
 
 	// write code
 	_, err = fmt.Fprintf(f,
-		"package %s\n\n"+
+		"// Code generated by downloader.go; DO NOT EDIT. \n"+
+			"package %s\n\n"+
 			"import \"github.com/Tnze/go-mc/chat\"\n\n"+
 			"func init() { chat.SetLanguage(Map) }\n\n"+
 			"var Map = %#v\n",