Added Jack Jansen's versioncheck to the README file.
diff --git a/Tools/README b/Tools/README
index f0b9bf9..dcb12d2 100644
--- a/Tools/README
+++ b/Tools/README
@@ -17,4 +17,7 @@
 		converting old Python sources to the current language
 		definition.
 
+versioncheck	A tool to automate checking whether you have the latest
+		version of a package (by Jack Jansen).
+
 webchecker	A link checker for web sites.