New 'make github-deploy' rule to deploy the docs to github-pages

docs/Makefile

@@ -62,6 +62,11 @@ push:
 	@cd _build/html/ ; \
 	dotcloud push
 
+github-deploy: docs
+	rm -fr github-deploy
+	git clone ssh://git@github.com/dotcloud/docker github-deploy
+	cd github-deploy && git checkout -f gh-pages && git rm -r * && rsync -avH ../_build/html/ ./ && touch .nojekyll && echo "docker.io" > CNAME && git add * && git commit -m "Updating docs"
+
 $(VERSIONS):
 	@echo "Hello world"