GNUstep base library port to windows.

[Richard Frith-Macdonald]

I now have the base library pretty fully working using MINGW on 
windoze-xp

By fully working, I mean that I have the Distributed Objects system 
working ...
which, as it's the trickiest code for portability, is a pretty good 
indicator.

The networking code is using vanilla winsocks (ie very unix like) and a 
fair
bit of work will be needed rewriting it to integrate windows messages and
non-network file handles with the runloop (which we probably want to have
for developing a native gui) -
but it works to let distributed objects servers talk to each other.

Doubtless many bugs still exist.