errors/

FUTURE:

1. Fold in messages inline instead of using the stringfile (sails-stringfile still isn't worth it, at least not until post-v1)
2. Ideally we don't call process.exit() at all- instead, consistently call sails.lower(). See comment at bottom of fatal.js. That's ok sometimes actually (We have process handlers anyway.) The issue is that we really need to inline these, because it all depends on the context.
3. Inline these errors where they're being used. Then this directory can be deleted.