* doc/tools/todoxygen.sh: Take a HTML file as input instead of a
	LaTeX one.
	* doc/Makefile.am (DOC_PACKAGES): New variable.
	(TECHNICAL_HTML, TUTORIAL_HTML, REF_GUIDE_HTML):
	New variables.
	($(TECHNICAL_HTML), $(TUTORIAL_HTML), $(REF_GUIDE_HTML)):
	New targets.
	(dist_doc_DATA): Add $(TECHNICAL_HTML), $(TUTORIAL_HTML) and
	$(REF_GUIDE_HTML).
	($(TECHNICAL_HH)): Depend on and process $(TECHNICAL_HTML) instead
	of $(technical_dir)/technical.tex.
	($(TUTORIAL_HH)): Depend on and process $(TUTORIAL_HTML) instead
	of $(tutorial_dir)/tutorial.tex.
	($(REF_GUIDE_HH)): Depend on and process $(REF_GUIDE_HTML) instead
	of $(ref_guide_dir)/ref_guide.tex.
	(CLEANFILES): Remove now useless patterns.
	(clean-local): Likewise.
	Adjust paths.