improvements to sytnax
improvements to sytnax

Took out luasetups, on the assumption that they are rarely used and thus not worth the effort to support. Reworked the inline sectioning commands `\section`, to support the full variety of syntaxes they support (5 by my count).

equiva1ence/ConTeXtTools,SQbQxeKd3JHD8/simple_ConTeXt