Pre-alpha D language online tour

[Mark Isaacson via Digitalmars-d]

This is awesome! My one complaint is that the section of the 
screen that contains the code doesn't scale well vertically when 
my browser window is large. The written explanations scale to fit 
the content, the code editor does not. I'd just make it stretch 
vertically to fill the screen :). At that point you might also 
consider putting the Run/Reset buttons at the top.