Wiki categories need to be cleaned and updated

[mgage]

The Categories on the wiki operate somewhat like directory headings. By default all wiki pages are posted in a flat file structure. You can add a page to one or more categories.

The categories have gotten somewhat disorganized. They need to be reorganized (probably some of the categories should be pruned or at least deprecated.

There has been some effort to tag outdated pages as historical documents or out-of -date with reference to the current page. More of this needs to be done.