* switch to react-dom/test-utils

* remove dependency

* add image files and get new text in there

* modal content + refactor

* update illustrations and remove redundant one

* add tests

* add images

* button text tweaks

* padding

* QB modes, actions, and drill throughs.

* Refactor drill throughs + misc bug fixes

* Port sort action to drills

* Smarter 'view this/these' name

* Scalar hover state

* QB actions: don't skip action selection screen unless the action is marked as 'default'

* Fix flow errors

* Fix drills

* Show "This X's Ys" for FKs

* Prevent qb from uneccesary push states

* Don't show (fk) breakout fields that have already been broken out

* Fix 'drill into this' unit

* Cleanup timeseries footer

* Cleanup qb selectors

* Namespace all qb actions

* Make modes dependent on previously run card

* More timeseries footer cleanup

* Fix table crash

* Make breakout legend clickable

* Fix datagrid pivot test

* Flow + lint

See http://roadtolarissa.com/coloring-maps/ and
http://bl.ocks.org/thadk/37ff4c03358b414acd1e as to why this is a better
solution than quantize.

* jest setup and simple tests for Button

* add jest to CI

* cleanup

* make eslint play nice