A directory of directories of WellKnown files

A bit of reorganizing today.

Data is the root dataset. It is in directory /WellKnownDirectories/DataSets.

This allows for the creation of a new descriptor for directories (like DataSets and ToDo1), and consequently the attachment of new capabilities. And I've done so.

WellKnown files have mostly randomly generated names. So doing a dir command in a directory of wellknown files is not helpful. A new command, sh, then is helpful for listing the well known names in the selection list. Another command, sh on a dataset, works similarly, listing the well known names of the dataset items in the selection list.

The new xset command is working, and I've updated the ToDo1 web page. But I still need to work on Relations1 and Phonebook1. Perhaps tomorrow.