Added make docs

Author: tj

Makefile

@@ -5,4 +5,17 @@ test:
 		--serial \
 		-I lib
 
-.PHONY: test
+docs: index.html
+
+index.html:
+	dox \
+		--title "Knox" \
+		--desc "Light-weight Amazon S3 client for [NodeJS](http://nodejs.org)." \
+		--ribbon "http://github.com/LearnBoost/knox" \
+		--private \
+		lib/knox/*.js > $@
+
+docclean:
+	rm -f index.html
+
+.PHONY: test docs docclean