[NTG-context] ConTeXt-updater i-Package updated

I have reinstated the automatic update of the TeX ConTeXt-updater i-Package, which will again automatically be updated when Hans Hagen updates his ConTeXt (stable or beta or both). The package offers choice between ConTeXt and ConTeXt beta (when available) on install. G PS. For NTG-ConTeXt: i-Packages are a software install mechanism for Mac OS X only. For most of you, this will be a very cryptic message I guess. I'll be posting this only once to NTG-ConTeXt. People interested in using i-Installer to keep their TeX up to date on Mac OS X may get their info from the Mac OS X TeX mailing list.