- Added autoprefixer.
- Added a PostCSS plugin to transform CSS variables to static references for maximum compatibility. This also appears to have reduced the size of the framework significantly.
- Added PostCSS, mostly so that cssnano could be used. This is a CSS minifier that makes many focused optimizations. With this, I was able to shave about 2% off the final build. It's not much, but as the project matures, it may be good to be proactive.
- Since cssnano was added, I removed CleanCSS. This necessitated some changes, notably that errors/warnings are no longer captured since PostCSS doesn't provide those in its own results process.
- Changed division of length to 1024, since a kilobyte is 2^10 bytes, not 1000.
