Node.js can do better than process.argv.slice(2).

I'd like to discuss what the scope of something like this should be. Just a couple notes from my head:

• People have opinions and different needs around how arguments should be parsed, so we're not likely to please everybody with an implementation, which is fine; those who want something different don't need to use it.
• My original intuition here was that automated help output would be overreaching. But, seeing as how help output is literally in every single command-line tool (failing that, a man page), we should strongly consider it.
• The API should be familiar to Node.js users.
• As this would likely require a new module name, I'm unsure what to call it to avoid potential collisions (assuming there's not going to be a namespace to put it in)
• It could be a "blessed" Node.js org project, and eventually make its way into core.

Prior art:

• Python's argparse
• yargs-parser
• commander.js
• Ruby's commander

(team: feel free to add more links to examples)