Cleanup of medley repo -- proposal

[masinter]

I think we need to move things around a bit to clean up. Here are some ideas for discussion:

• remove inactive files from the repo -- 'obsolete' 'fontsold' 'fonts/altofonts' -- maybe do this last

• keep 'loadups' for all results of doing a loadup -- lisp.sysout whereis.hash exports.all fuller.database *.dribble

• move *.venuesysout out of the repo

• add a new folder to hold starter.sysout

• move rooms to be under library

• separate legacy lispusers (updated but made 20 years ago) from modern stuff

Then we'd have

• sources (used to make lisp.sysout)
• sources-init (only used by makeinit?)
• library (loaded into full.sysout)
• library-new (modernize et al)
• lispusers (only those that have been tested)
• lispusers-unsorted (to be moved into lispusers or tossed)
• greetfiles -- just in a lispusers/init folder, rename MEDLEYDIR-INIT to INIT-MEDLEYDIR
• change the loadup process to just make the files where they should wind up, instead of making them in tmp and copying.

From #913