index: add node.js section and express gcp backend

RE: https://github.com/tastejs/todomvc/pull/1060#issuecomment-62206239

React 0.12 upgrade

Implement backend API to Angular.

- Remove obsolete @jsx annotations
- Rename renderComponent -> render
- Use event.preventDefault instead of returning false

i.e. = that is, e.g. = for example

I looked through the changelog and couldn't find any changes that were relevant
to us. If you can think of any, please open a PR!

Move attribute comparator with others

Use === insteadOf == even for strings

Unused dependencies

Update todomvc-common of vanillajs example

Use Marionette Controller

Spec consindrerations

ampersandjs: add multi-tab sync via storage events