Feature request: a way to make absolute URL markdown links have target=_blank

[avh4]

In general within my styleguide, I'd like to make links to external sites automatically open in new tabs. If target=_blank were automatically added to any markdown links with an absolute URL href, or if there were a Theme/Book/Chapter/etc option to enable that, then I could easily do so. (I'd still want styleguide-internal links (which are all going to be relative URLs) to behave as they currently do.)

[avh4]

I guess alternatively, an option to provide a custom base Markdown.Renderer would also give me a way to do this.

[georgesboris]

Providing a custom markdown renderer is interesting for a future version but for now it should be easy to add a target blank for all external links (it will throw false positives if the full path is an internal one tho).