updated makefile to store updated docs in gh-pages root

docs/Makefile

@@ -28,7 +28,8 @@ latexpdf:
 	@echo "pdflatex finished; see $(PDF)"
 
 commithtmldocs: html
-	cd $(BUILDDIR)/html; git add . ; git commit -m "rebuilt docs"; git push origin gh-pages
+	cp -r $(BUILDDIR)/html/* $(BUILDDIR)
+	cd $(BUILDDIR); git add . ; git commit -m "rebuilt docs"; git push origin gh-pages
 
 # Catch-all target: route all unknown targets to Sphinx using the new
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).