Fix some _ -> {PREUNDERSCORE} occurrences.
Fix <pre> environment, use lstlisting, not verbatim.
Run pdflatex three times, to get cross references etc. right.
Fix issues with titles not being escaped correctly. Also, fix underscore and backslash in LaTeX.
Initial addition of config.py.in. Also add it to Makefile.am. Also, use PYTHON_PROGRAM, set at configure time, not python directly, in Makefile.am
Changes: Update autoconf files.
Update as per the advice from autoconf.
Update m4 files with the latest from Emdros.