The root URL was missing the baseURL portion. This is fine when a site is hosted on a custom URL such as docusaurus.io, because the generated URL will be valid (docusaurus.io/blog), but it breaks when the site is hosted on GitHub Pages (the React Native feed was using facebook.github.io/blog as the rootURL).
* Fix link to header image
* Add Prettier formatting to source files and example files, and check that Prettier formatting is maintained on PRs
* Remove trailing-comma as we are using Node 6 on Circle
* Use latest Node 6 LTS version in Circle
* Remove unused test
* added a note about needing more than one language to be enabled to allow for a drop down
* Removing debug statements
* Add 'Help Translate' to translatable strings, improves error messages around missing translated strings, calls write-translations on some routes
* Adds sitemap.xml to live server and build. Versioning not supported. -- Also did some file name and module cache cleanups.
* Add Reason support to Prism.js
* Add XML/ATOM feed. Generates for both localhost and build script. Adds meta links to feeds to all html files.
* Updated /core/Footer.js to pull from siteConfig
