[ESS] Emacs 22.1 is out!

[Richard M. Heiberger]

I think we need just a minor change to the ESS documentation

The ess-r-versions code in essd-r.el is used to
create functions for all versions of R on the machine, in Windows
for all occurrences of */bin/Rterm.exe, in Unix for all versions beginning 
the prefixes in ess-r-versions.  The creation of the functions is initiated
by ess-site.el.

On Windows, if the environment or the site-start.el includes R in its PATH, then that
is the default for M-x R.  If R is not in the PATH, then the version with the most recent is
placed on M-x R.  This needs to be more clearly documented.