Add reference to help in the readme

Author: rpavlik

Diff for: README.markdown

@@ -62,6 +62,10 @@ modules, for that, just add another line following the first one:
 
 	include(UseBackportedModules)
 
+Look at module-help.html/txt (generated by update-help.sh on a unix-like shell)
+either in this directory or online at <http://github.com/rpavlik/cmake-modules/blob/master/module-help.txt>
+for more information on individual modules.
+
 
 Licenses
 --------