SSC 0.0.101

This version:

MathML 4, Dec 2020 draft (it’s early days; MathML 4 is really MathML 3 with post–it notes)
can run in the OpenBSD 6.8 httpd server CGI environment (do NOT expose SSC to untrusted data sources, such as those on the open web, without taking serious precautions: ssc is pre–alpha software, and probably has more bugs than the Creator’s Ultimate All–Beetle Extravaganza)
--shadow.changed: only update files in the shadow directory when the originals have changed
expanded ligature suggestions now work across systems
recognise the non–standard character codes &bang; &hash; &splat; &squiggle; (! # * ~)
improvements to corpus data extraction

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