Add link() transform

[dhowe]

Types of links: html, riscript-internal, custom?

Use-case for arguments. A. inline (Some text).link(http://blah.com/foo/bar.html) (Some text).link(foo/bar.html)

B.

$opts={type:html, href:http://blah.com/foo/bar.html, target:_blank }  // a JSON string
(Some text).link()