* Removed hamburger and inserted close button in sidebar
* Replace sidebar mobile slide out with fade in
* Updated mobile menu button to translate into different languages
* Create sidebar hamburger menu for mobile
* Improve sidebar UX and mobile menu
* Fixed sidebar UX bug where blue text breadcrumb didn't appear and fixed hover/focus styling
* Improved UX of hamburger by applying toggle animations
Universal increase in font size
Use same font as ss.org for consistency
Remove unnecessary visual noise (borders, box shadows, etc)
Use Google PrettyPrint syntax highlighter for improved readability of code sections
Fully responsive, with hamburger menu
Add "section" linking mode to menu items
Add masthead for breadcrumbs, introduction
Improved styles for notice/info/warning messaging
class "container" was missing, so a bunch of CSS wasn't being applied.
The layout of the default docsviewer checkout now looks more like the
one on doc.silverstripe.org.
Remove breadcrumbs from the searchbar to the top of the page content,
and make sure they only display if there is more then the current link.
Wrap the module and version selectors to fill the gap in the searchbar.
