This reverts commit b04ea0c4.

The <header> element specifies a header for a document or section.
The <nav> element defines a set of navigation links.

These elements are more meaningful to screen readers and other devices and improve the accessibility of a site.

* Make NewsListNav standalone component

* UI improvement: add 2nd NewsListNav to the bottom, make 1st movable

* Use kebab-case

In order to get the updated score, we need to call fetch items every time.

logo.png 404's at the moment

Since the module is used to bootstrap a production version of the site (see the npm `start` script), it shouldn't be inside devDependencies.

Remove .babelrc since using Bublé