This PR contains a large number of changes in support of the implementation of the Medley Dsplay Fon file format.
The changes are documented in the docs/internal/FONTCHANGES.TEDIT file.
EDITFONThad its own slightly different version. Now centralized in FONT with slight adjustments to internal interfaces.
Note that we don't have a way of writing AC font files, as near as I can tell
* EDITFONT: CHARSET in interface
* IDLEHAX, LIFE, TMAX-ENDNOTE: Clean up conflicts in making full masterscope DB
* FONT: Add charset coercion for TERMINAL
* TERMINAL fonts: Remove bogus character set files
so that better coercions can take place