Use minified RxJS

Reduces built JS file from 1.1M to 804K!
Remove granular requires, just require('react')

If we want to use the minified version of React, then these granular
`require`s don't work. So what was originally intended as an
optimization is now preventing optimization.
Use minified React

Built JS file down from 804K to 331K!
Add webpack dev config and don't minify in dev

This would be great, but it's not working. When I run `npm run dev`,
there are issues relating to the `rework-loader`.
Revert "Add webpack dev config and don't minify in dev"

This reverts commit e4fcaacfe68296a144ec90998ff7fe7d014b413a.
Merge branch 'optimize'