Bail with usage message if config does not exist.

[oremj]

Catch and handle the exception which occurs if -c does not exist.

[jirwin]

@oremj Sorry it took so long to get to this. I think it might be better to use the .demand() feature of optimist. More info on that here.

What do you think?

[oremj]

@jirwin .demand() just assures that the argument is passed. This patch bails gracefully if the config file is passed, but does not exist on the fs.

[jirwin]

@oremj You're totally right. Thats what I get for reading code late on a Friday. Thanks for the patch.

[oremj]

Thanks @jirwin !

[robert-chiniquy]

Nice.