muse-latex2png: Parametrize and create subdirectory when needed.
* lisp/muse-latex2png.el Rename all functions to have a "muse-latex2png"
prefix. Turn all variables into customizable options in the
muse-latex2png group.
(muse-latex2png-img-dest): New option specifying where to place the
images.
(muse-latex2png-template): New option containing the template to use
for the surrounding LaTeX code.
(muse-latex2png-use-xhtml): New option that toggles strict XHTML
compliance.
(muse-latex2png-move2pubdir): Avoid multiple redundant error messages
when something else goes wrong. Create the image subdirectory if it
doesn't exist already -- thanks to Christian Straßer for the report.
Expand the filename properly.
(muse-publish-latex-tag, muse-latex2png): Ditto on error messages and
filename expansion.
(muse-latex2png): Use the "muse-latex2png" prefix by default. Set the
default directory properly.
git-archimport-id: mwolson@gnu.org--2006/muse--main--1.0--patch-183