slight tweak to README to show more complete example.
slight tweak to README to show more complete example.

dkoleary88/yargs,ChristianMurphy/yargs,ammeep/yargs,dkoleary88/yargs,sgentle/yargs,yargs/yargs,etiktin/yargs,bcoe/yargs,ggoodman/yargs,nexdrew/yargs,oti/yargs,nexdrew/yargs,rstacruz/yargs,yargs/yargs,jvdm/yargs,jean-emmanuel/yargs,elas7/yargs,raine/yargs,LoicMahieu/yargs,tepez/yargs,zkat/yargs,tepez/yargs,geophree/yargs,jean-emmanuel/yargs,ammeep/yargs,yargs/yargs,bcoe/yargs,geophree/yargs,elas7/yargs