Adds isomorphic alt example

[goatslacker]

This can probably go in a separate repo so as not to cloud this one but here's some code in a nice and tidy single commit that has the demo working.

This PR is a copy of alt but with

• Removes index.html
• Adds server.js
• Adds es6-promise so we can keep track of when our API loads data
• Changes WebAPIUtils.getAllProducts to return a promise instead of firing off an action

Also to note: I haven't ran the fluxible demo but I'm thinking it would also work on the server side as-is.

[goatslacker]

I've also included a README which details how to run it as well as a birds eye view of how it works under the hood.