Updating dlang.org documentation

[Mike]

I've submitted a couple of pull request to fix some dlang.org's 
documentation, using github's web editor.  The changes were 
simple, so I really didn't need to render the .dd file to verify 
my changes.  However, if I make a larger change, I'd like to be 
able to see the end result as readers will see it.

How can I render the .dd files to html?
Thanks,
Mike