Adding D Editor Support

[Lutger]

John A. De Goes wrote:

> Robert Fraser Wrote:
>> There's multi-line error messages (for example, if there's an ambiguous
>> overload), and occasionally messages don't have a line, just a file.
> 
> Crap.
> 
...

Here is the ambiguous overload:

crap.d(13): function crap.foo called with argument types:
        (int)
matches both:
        crap.foo(uint)
and:
        crap.foo(ulong)


I have not heard about UNA before, it looks really nice!