Implement a Redux store

[turnerhayes]

If it ends up being too much of a barrier to new project members, we may later remove it.

Other alternatives:

• Context API
• Hooks
  • Interesting bleeding-edge feature (currently in alpha); we'll have to see where it goes

[knod]

Since it looks like I haven't put this down in writing yet, my suggestion is we start small and see how it goes.