Better command line parsing

[Oceanswave]

I'm sure there's some module out there.

• should support shortcuts (i.e. -u vs --username, -c vs --continue)
• display error message on unrecognized args
• display error message on unspecified required args

[Oceanswave]

argparse looks to be awesome
https://github.com/nodeca/argparse

[Oceanswave]

Also, Commander
https://github.com/tj/commander.js