New std.process revival

[Alex Rønne Petersen]

Hi,

I decided to take a stab at reviving the new std.process written by Lars 
T. Kyllingstad and Steven Schveighoffer.

The result is here: 
https://github.com/alexrp/phobos/tree/new-std-process-update

I decided to extract the work into new commits because rebasing the old 
branch in Lars's repo was way too cumbersome after so many months (and 
that branch also had a lot of merge commits). The code is obviously not 
written by me; all I did was a couple of build and test fixes.

It currently works on 32-bit and 64-bit Linux. It would be great if 
someone could take it for a spin on OS X, FreeBSD, and Windows to see 
how it fares there (I'm particularly worried that I may have broken the 
Windows build).

Lars or Steven, would either of you be willing to go through the review 
process with this module? I sent the druntime changes upstream a while 
back, so the Phobos changes are really all that remain in order to have 
it included.

-- 
Alex Rønne Petersen
alex at lycus.org
http://lycus.org