[metapost] new supp-mis.tex and supp-pdf.tex

[Karl Berry]

Hans has posted new experimental versions of supp-mis.tex and
supp-pdf.tex, for reading MetaPost output, etc., from TeX.  Testing
would be more than welcome.  They're in the TeX Live development
sources:

http://tug.org/svn/texlive/trunk/Master/texmf-dist/tex/context/base/supp-mis.tex?view=log
http://tug.org/svn/texlive/trunk/Master/texmf-dist/tex/context/base/supp-pdf.tex?view=log
http://tug.org/svn/texlive/trunk/Master/texmf-dist/tex/context/base/supp-mpe.tex?view=log

Thanks,
Karl