feature request: org-mode document rendering #197

i have a handful of org-mode documents in my repos (example readme), and it would be nice if tangled was able to render them like it does with markdown files.

niklasfasching/go-org seems to be the most maintained golang library for rendering org-mode documents - a very brief glance at the code suggests the rendering was designed to support multiple formats, so it seems possible to drop something like that library into there.