Add babel-preset-react-optimize

[bkniffler]

Hey,
I think https://github.com/thejameskyle/babel-react-optimize would make a great addition! Would you consider adding it?

Adding it as a devDep and tweaking the babel query should suffice

            presets: [
              // JSX
              'react',
              // All the latest JS goodies, except for ES6 modules which
              // webpack has native support for and uses in the tree shaking
              // process.
              // TODO: When babel-preset-latest-minimal has stabilised use it
              // for our node targets so that only the missing features for
              // our respective node version will be transpiled.
              ['latest', { es2015: { modules: false } }],
              isProd('react-optimize'),
            ],

[ctrlplusb]

I would be okay with it, but having a quick browse through the issues list it appears there are some edge cases. I would prefer that we didn't risk any headaches. :)

[bkniffler]

Seems reasonable!