supporting DMD-1.016 and DMD-2.000 with the same source code

[BCS]

Reply to David,

> I just wanted to point out that the v1.016 compiler still show that
> it's v1.015...the zip does show 17.Jun.07 updated files instead of

DMD 1.016 uses the same dmd.exe as 1.015 the only difference is in phobos.

> 05.Jun.07 that the v1.015 zip had, but I believe this will throw off
> Thomas's version compares in code.
> 

I don't think dstress will end up being run on both 1.015 and 1.016