* Remove stale files, add README, correct XCCS-164 JIS
* Remake UNICODE-FORMATS to be sure it reflects current files
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Co-authored-by: Matt Heffron <heffron@alumni.caltech.edu>
* UNICODE: a few additional Tedit helpers, revised documentation
* New JIS files (courtesy of Peter)
* Updated mapping files (courtesy of Peter Craven)
* UNICODE: changed SHOULDNT to ERROR