* Add news content
* Switch to new home page
* Move docs home page to a new page
* Switch to home page content
* Adjust global menu: remove showcase
* Remove unneeded portion of the front matter
* Remove old theme
* Update content for new theme
* Fix content to new theme
* Move layouts into theme
* Move classes to config
* [WIP] theme
* [WIP] inline critical CSS
* Add some notes on the [WIP] critical CSS feature
* Make theme changes for themes site
* Import theme updates from themes site
* [WIP] theme prev/next links
* Revert critical CSS tests
Didn't move the needle on a 20kb (gzipped) stylesheet.
First view speed index is 1008 without CSS.
* Not using docsnav data file
* Backdate these articles so we keep them but they don't show up on top
* Change Twitter handle to work with Hugo's internal templates
plus a few minor clean-ups
* Update theme (change Twitter handle in Follow link)
See PR rdwatters/hugo-docs-concept#120
