Folkert van der Beek

The .finally() method is missing in [some versions of react-native](https://github.com/facebook/react-native/issues/19490), so I replaced it with .then(onFinally, onFinally).

Document use of `aio-make-callback` and `aio-chain`

7

I would like to use emacs-aio for my package [emacs-pubmed](https://gitlab.com/fvdbeek/emacs-pubmed). The aim is to retrieve multiple urls in queue, i.e. while maintaining the order (see [issue 3](https://gitlab.com/fvdbeek/emacs-pubmed/issues/3)). Meanwhile, I have...