Changes

If you ''don't'' have an installed ConTeXt distribution, you must download from http://minimals.contextgarden.net/setup/ the appropriate zip archive for your system, and run the shell / batch script in the top-level directory (which should be called <code>context</code>); it is a very simple script that sets the necessary environment to run mtx-update, and it accepts exactly the same switches as mtx-update. By default it will install a ConTeXt distribution suitable for pdfTeX on your system; the top-level directory for that distribution will be <code>context/tex</code> until you tell it otherwise (with the <code>--texroot</code> switch).