Support simple URL automatic hyperlinks in Markdown documents

I'd like to ask if you can support in the Markdown renderer to automatically hyperlink regular "unmarkup'd" URLs in a Markdown document (i.e. in README.md). Currently URLs not adorned with Markdown link syntax are rendered as any other text, but it would be useful to have the URLs rendered as clickable links.

The lack of this feature is inconvenient for README files where a number of URLs are present as it requires adding unnecessary markup around the URLs to get them to render.

Sample document:

#!text

This URL (http://www.example.com/) would not be rendered as a hyperlink in README.md, but it should!

This URL will ([http://www.example.com/](http://www.example.com/)), but it takes extra needless effort.