download from http://golang.org/ or brew install go or something
download Google App Engine SDK for go,see the tutorial -> https://developers.google.com/appengine/docs/go/gettingstarted/devenvironment
# goapp get github.com/go-martini/martini
# goapp get github.com/martini-contrib/render
# goapp serve
# goapp test
# goapp deploy