Better docs for D (WIP)

[Adam D. Ruppe via Digitalmars-d-announce]

BTW wouldn't it be great if the compiler's error messages showed 
each level of pass/fail for those constraints? For the docs, I 
don't mind doing a few special case, hand written things, but the 
compiler needs something a bit more generic.

I think the way to code that is whenever the compiler is printing 
an expression that can convert to bool, color it based on the 
result, and do this through the whole tree from the bottom up.

Then the use could tell at a glance which parts succeeded and 
failed when reading the error message.

It'd be kinda nice if it showed the result of non-bool things too 
but that's going to be hard to do on a console without becoming a 
wall of text, even with whitespace formatting...


But the compiler will come later, for now I gotta do docs!