MAST project - fixing dead links

Purpose of this MAST project: Reduce the number of links that lead to 404 pages on the wiki. For two reasons: [1] it's good form for a wiki to avoid dead links that interrupt users' wikiwalks and [2] this will de-clutter the Wanted Pages feature of Wikidot, making it more useful to staff.

Procedure:

Got to any page of the wiki, scroll to the bottom, click Site Tools, there click Wanted Pages.

in progress