* doc/Makefile.am (CLEANFILES): Remove
	$(technical_dir)/technical.haux,
	$(tutorial_dir)/tutorial.haux,
	$(ref_guide_dir)/ref_guide.haux and
	$(ref_guide_dir)/ref_guide.htoc.
	(clean-local): Remove (phony) target.
	($(EPSS)): Move...
	(MAINTAINERCLEANFILES): ...here.
	Add $(TECHNICAL_PDF), $(TECHNICAL_HH),
	$(TUTORIAL_PDF), $(TUTORIAL_HH),
	$(WHITE_PAPER_PDF)
	$(REF_GUIDE_PDF) and $(REF_GUIDE_HH).