Coordinator dashboard (client-side)

Client-side code for the coordinator dashboard. This is only the page that handles matching donations. Pretty much all the client-side logic is finished, so next step for this would be to integrate actual backend stuff with this.

This is a minor thing, but I had to pull in code for Bootstrap's modals, because the way Foundation implements modals doesn't work well with react. 
Delete empty helpers and tests https://github.com/calblueprint/style-guides/blob/master/rails/README.md#delete-empty-tests