Add note about -r when using with node

[mike-zorn]

This resolves #113

[LinusU]

This looks very good, mind rebasing on top of master?

[mike-zorn]

@LinusU I've rebased.

[uiteoi]

Option -r was added in Node v1.6.0

https://nodejs.org/api/cli.html#cli_r_require_module

[LinusU]

I think that everyone is using Node.js 4 or newer, can we skip mentioning versions of Node at all and just give them titles like "CLI Usage" and "Programmatic Usage"?

[uiteoi]

Skipping mentioning the version is fine, but if we mention a version might as well be the correct one.

[mike-zorn]

Technically, the version is correct 😛 Although, this feature has been around since 1.6.0, it didn't work with things in node_modules until 2.2.0. See the second bullet point here. That being said, two years later, no one cares about versions 1-3, so I'll adjust the note.

[LinusU]

Thanks!

[LinusU]

Published in 0.5.1