inliner task

[mklabs]

Just found out about https://github.com/remy/inliner is a fantastic package, we should use it, or at least take inspiration from.

• have a super nice api ->eventemitter.
• build a list of all assets used
  • all inline images and base64 encode
  • all external style sheets
  • all image references in CSS
• even supports css inlining (we now do this through rjs)
• can convert img as based64 data urls in both html and css
• inline scripts / styles

It does however a few thing that we likely already do.

• a bit of feature overlapping
• relies on jsdom, so that will be a pain for windows user

It can also be the main handler for the dom-based build. Also thinking of playing with substack/node-trumpet to rely on a streaming html parser and remove the need of jsdom or cheerio.