Make the buffalo verification use the "help" subcommand

[jgandt]

As of version v0.16.17, the buffalo command with no subcommand returns an error after printing out the help message e.g. ERRO[0000] Error: subcommand is required

Thus adding the help subcommand avoids displaying that error to the new buffalo user.

I also updated the output of the help command to the match the latest version.