Add @aaronj1335's rework-loader to node_modules/
Add suitcss & rework dependencies to package.json

Modeled after @aaronj1335's work on admin-app.

Not sure if all of these are necessary. Just trying to get this working
now, later can prune.
Configure webpack to use rework-loader

Also remove `css-loader` which we no longer need.
Test setup for suitcss (doesn't work)

`@import "suitcss"` fails, not sure why. Also, since we removed the
`css-loader`, our app styles are no longer applying.
add `style` to webpack `resolve.packageMains`

this is necessary so that webpack knows how to resolve suitcss-style npm
packages that only have css.
add `when` to dev dependencies

this is used in `rework-loader` and can be removed once that's factored
out into a separate module.
Merge branch 'aaronj1335-package-mains-config' into suitcss
Reformat `packageMains` array in webpack config
Remove `suitcss-utils` from `dependencies`

Don't need to depend on @aaronj1335's fork anymore, since @necolas
merged https://github.com/suitcss/utils/pull/11 and republished
`suitcss-utils`.
Center container `div` with SUIT util
Remove test style
Use SUIT `Button` component class
Style button width with SUIT
Add default button styles
Add spacing between buttons with SUIT grid

Defines new SUIT-style class, `Grid-withVerticalGutter`, to include
spacing between buttons vertically.
Make SUIT dependencies more granular
Break line so its less than 80 chars long
Remove trailing whitespace
Merge branch 'suitcss'