- purify: apply target=_blank to links
- purify: remove ALLOWED_URI_REGEXP - this breaks external links in
anchor elements
- purify: return a DOM fragment instead of a string
- postprocess: only highlight pre
- postprocess: remove nested code inside pre
- better style messages with css
This significantly reduces the bundle size(over 1MiB!) but it also uses
some hacks to dynamically load browserify modules on runtime(see
lazy-load-modules.js