- Upgrade to Bootstrap 4.5.3.
- Upgrade to Font Awesome 5.15.1.
- Reduce image size by converting most assets from PNG to JPEG.
- Add support for line numbers and highlights in code samples.
- Add keywords meta tag in articles' header.
- Compile all local CSS and JS files into a single minified file.
- Add support for `.scss` style files. Add dependency on `libsass`.
- Add dependency on `pelican-webassets`, `cssmin` and `closure` packages.
- Remove `extra_css` block in base template.
- Add project header image and logo.
- Remove special font only used for titles, headers and Typogrify ampersands.