Use isomorphic fetch

[rmccue]

It would be great if this library was isomorphic so we had both a low-level and high-level client available for both Node and browser JS.

https://github.com/matthew-andrews/isomorphic-fetch seems to provide a good solution for this.

[BE-Webdesign]

https://github.com/qubyte/fetch-ponyfill

This is another library to consider using. It is a slightly cleaner approach and involves less things to worry about.

[andreasvirkus]

Any hope to get this implemented?