highlight.min.js only includes 22 commonly used languages. E.g. Go and
Rust are not part of that set. This change allows users to add the JS
for additional languages via a config option.
I've also updated the library to the newest version.
- Change color from orange to blue; improve colors elsewhere
- Change `div.section` to `section`
- Rename `posts` directory to `blog`
- Add ability to specify extra CSS files in `config.toml`
- Removed `WebFontsFile` feature from `config.toml`
- Remove the initials displayed on top right of single post pages
- Update example site
