Add examples section to command documentation

[FSeidinger]

For commands it would be helpful, if you can add examples to the command documentation just as some manual pages have it.

I've cloned your project and added an attribute "examples" to the @ShellMethod annotation to achieve this in my private branch. If you want, I can provide a pull request.

Kind regards,

Frank

[jvalkeal]

This is something what I've been thinking about lately. With 3.x we should try to make help more customizable with custom sections.