like the approach we're starting to take with http://istanbul.js.org/, I'd love to see us split our very long yargs README document into various targeted tutorials. e.g.,

• using commands (CC: @nexdrew).
• argument validation (CC: @lrlna).

What do you think? also looping in @maxrimue @Charlotteis.