Add client code to perform IP geolocation and write the country to the app state

[jwalgran]

Overview

Add a component that makes a request to a web service which returns client information based on IP address. Write the detected country to the app state.

Is your feature request related to a problem? Please describe.

We need to detect when users are browsing from China and update our client-side map resource loading accordingly.

Describe the solution you'd like

• From the client, make a request to https://api.userinfo.io/userinfos
• If available, write the value of country.code in the response to the Redux store.
• This should only happen once, on page load