Ram

update to support latest `create-react-app` and include `web-dev-server`

1

Let me know if this would be useful, I can put a PR up with the changes. Alternatively, just adding `"webpack-dev-server": "1.16.3"` to `devDependencies` works. Was able to follow https://medium.com/@luce.williamt/using-grommet-with-create-react-app-8e8ddaa836ee#.7axt1sy29...