Animations(?)

[jimfulton]

In an older version of the app, I used animations to have cards fade out of an old location and fade into the new one after a move. This made it a tad easier for users to see that the change happened. This was based on ng-animate.

There's a similar library for React, https://facebook.github.io/react/docs/animation.html. We probably want to use it, and reimplement for the current app.