dmdz, take 2

[Ellery Newcomer]

it doesn't really need itself to compile itself anymore (there's only 1 
or 2 files), but for posterity's sake:

http://personal.utulsa.edu/~ellery-newcomer/dmdz/dmdz.zip

Rewrote split or whatever it was to be a bidirectional range.

Also wrote a nifty join implementation (of which I am very proud don't 
you dare criticize <g>).

Got rid of the modified basename and dirname, but the troubles are 
recorded in

http://d.puremagic.com/issues/show_bug.cgi?id=3937
http://d.puremagic.com/issues/show_bug.cgi?id=4260

One side note: I couldn't think of an obvious way to make normalize a 
lazy range, unless you want it to only be able to iterate backwards.

std.process has been giving me trouble. I included some custom code for 
Posix, which I think Lars' efforts should obviate.

 From the windows shell, the output of the command passed to system() 
doesn't get printed to the screen. Ideas?


Now, about dmdz:

I restricted the format of the zip files a bit for some reason or other 
which may have made sense at the time (it was a while ago). The idea is 
in the zip there are directories

bin
lib
obj
resources
src

with appropriate files going in each.

I also added support for [platform specific] extra compiler flags in 
dmdz.conf.

Haven't done much stress testing on it, but I have been using it quite a 
bit in the past few months for one project in particular. ranges are a 
bit new, though.

I meant to kick the tires on windows, but dmd is failing me, so screw that.

So yeah.