[ESS] max lisp eval depth & ESS

[Richard M. Heiberger]

It is dangerous to place the zipfile in parallel with
the R installations.  ESS "knows" that all files of
form c:/progra~1/R/R*/bin/Rterm.exe are potential versions of
R.  They are all listed on the emacs menu bar when myfile.r is
active in the menu "ESS/Start Process/Other/R*".