Adding Markdown to Ddoc

[David Gileadi]

On 12/5/17 9:11 PM, Walter Bright wrote:
> https://help.github.com/articles/basic-writing-and-formatting-syntax/
> 
> Anyone interested in picking up the flag?
> 
> (I know this has come up before, and I've been opposed to it, but I've 
> changed my mind.)

I didn't notice anyone pick this up yet. I'm taking a stab at it, 
writing it mostly from scratch. However if someone else wants to pick it 
up you're very welcome; my attempt is likely to be slow, especially this 
time of year :)