* Show proper subcommand prefix in generated config CLI.
* Remove useless author info and copy command group description.
* Really accept (implicit) -h and --help flags.
These were disabled by HideHelp, leading to an error message in every
usage output. This way, the flags get documented as well.
* Override AppHelpTemplate to better match Kong's style.
* Override (Sub)commandHelpTemplate to better match Kong's style.
* Use <command> and [flags] like Kong.
Signed-off-by: André Colomb <src@andre.colomb.de>