* Start of conversion to CSS variables
* Use variable for Badge colors
* Use variable for avatar bg
* Use variable for user card bg
* Use css variables for hero
* Use css variables for buttons
* Use css variables for sidenav links
* Cleaner style attr
Co-authored-by: David Wheatley <hi@davwheat.dev>
* Replace gulp with webpack and npm scripts for JS compilation
* Set up Travis CI to commit compiled JS
* Restructure `js` directory; only one instance of npm, forum/admin are "submodules"
* Refactor JS initializers into Application subclasses
* Maintain partial compatibility API (importing from absolute paths) for extensions
* Remove minification responsibility from PHP asset compiler
* Restructure `less` directory
