C source code and R wrappers for the tth/ttm TeX-to-HTML/MathML translators.
The R package tth ships the C sources for convenient compilation and
installation on all platforms.
It also provides wrappers in R to process R character vectors with the command
line tools directly from the R prompt.
The textproc/tth port ships `tth' binary but the two sources differ.
The `ttm' binary isn't available in the ports tree.
Approved by: bofh (mentor) OR diizzy (mentor)
(Differential Revision: https://reviews.freebsd.org/D###)