Redirect HTML output to gh-pages directory

docs/Makefile

@@ -6,6 +6,7 @@ SPHINXOPTS    =
 SPHINXBUILD   = sphinx-build
 PAPER         =
 BUILDDIR      = _build
+HTMLBUILDDIR  = ~/Code/pymc-pages
 
 # Internal variables.
 PAPEROPT_a4     = -D latex_paper_size=a4
@@ -42,9 +43,9 @@ clean:
 	-rm -rf $(BUILDDIR)/*
 
 html:
-	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(HTMLBUILDDIR)
 	@echo
-	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+	@echo "Build finished. The HTML pages are in $(HTMLBUILDDIR)."
 
 dirhtml:
 	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml