Provide nextjs feature toggle HOC.

[kennylavender]

Design and implement a nextjs HOC that assists users in toggling content and status's based on active/inactive features. It should

• render the correct page on both the server and client
• send the correct status code from the server

Post suggestions for the HOC API here for discussion.

I believe nextjs requires that getInitialProps sets status code in order to accomplish the goals above.

Some details here: #37 (comment)

Don't export the new HOC in src/index.js. We want users to manually import this separate from the main module to avoid code bloat for those that don't use nextjs. See how RITEway provide render-component as an example