To save new RNN users some trouble, I've updated the recommended Obj-C that the installation guide tells us to paste over our App Delegate. I think the old one is obsolete because the #import and one of the Obj-C methods has change. Also removed a potentially misleading warning that might now cause users to wrongly blame their NPM version for trouble instead of these new changes. Anyway this new version works for me though someone might want to double check.