Imports github.com/codegangsta/cli github.com/mailgun/log github.com/mailgun/vulcan/template github.com/mailgun/vulcan/errors github.com/mailgun/vulcan/middleware github.com/mailgun/vulcan/netutils github.com/mailgun/vulcan/request github.com/mailgun/vulcand/plugin Standard library imports bytes fmt io/ioutil net/http net/url regexp