render patchwork/ssb messages to markdown.

patchwork has a few changes from standard markdown.

• emoji - everybody hearts emoji
• ssb links - links to cryptographic objects see ssb-ref
• mentions - @mentions like on twitter or github. mentions allow people to convieniently talk to each other, but are written as both the name used, plus the cryptographic reference.

var md = require('ssb-markdown')

Render raw markdown source to html. The output will be html content without a surrounding tag.

toUrl is a function which accepts an ssb-ref or @-mention string, and whether it is for an image or not, and returns a url string.

imageLink is a function which accepts an ssb-ref and will be used to generate links to wrap any images.

Render raw markdown to a single line of test, suitable for a one line preview that is opened to a view rendered with block.

MIT