Add a Makefile to generate classes doc in various formats

All the generated documentation is put in doc/_build.

doc/Makefile

@@ -0,0 +1,47 @@
+BASEDIR = $(CURDIR)
+CLASSES = $(BASEDIR)/base/classes.xml
+OUTPUTDIR = $(BASEDIR)/_build
+TOOLSDIR = $(BASEDIR)/tools
+
+.ONESHELL:
+
+clean:
+	rm -rf $(OUTPUTDIR)
+
+doku:
+	rm -rf $(OUTPUTDIR)/doku
+	mkdir -p $(OUTPUTDIR)/doku
+	pushd $(OUTPUTDIR)/doku
+	python2 $(TOOLSDIR)/makedoku.py $(CLASSES)
+	popd
+
+doxygen:
+	rm -rf $(OUTPUTDIR)/doxygen
+	mkdir -p $(OUTPUTDIR)/doxygen
+	doxygen Doxyfile
+
+html:
+	rm -rf $(OUTPUTDIR)/html
+	mkdir -p  $(OUTPUTDIR)/html
+	pushd $(OUTPUTDIR)/html
+	python2 $(TOOLSDIR)/makehtml.py -multipage $(CLASSES)
+	popd
+
+markdown:
+	rm -rf $(OUTPUTDIR)/markdown
+	mkdir -p $(OUTPUTDIR)/markdown
+	pushd $(OUTPUTDIR)/markdown
+	python2 $(TOOLSDIR)/makemd.py $(CLASSES)
+	popd
+
+rst:
+	rm -rf $(OUTPUTDIR)/rst
+	mkdir -p $(OUTPUTDIR)/rst
+	pushd $(OUTPUTDIR)/rst
+	echo "TODO"
+	popd
+
+textile:
+	rm -rf $(OUTPUTDIR)/textile
+	mkdir -p $(OUTPUTDIR)/textile
+	python3 $(TOOLSDIR)/makedocs.py --input $(CLASSES) --output $(OUTPUTDIR)/textile