serve 0.2.2 (new formula)

serve is a useful directory serving web server with just enough options
to save the day. It is written in Go and thus has very few dependencies
and runs (and compiles) extremely efficiently.
serve: refactor the test (tip from @mistydemeo)

no need to capture output as we are not using it
serve: update to v0.2.3

minor change to version number (correctness)
serve: add 0.2.3 bottle.