#1 Add support for native Windows and cross compilatio

[Tsuna]

Hello Victor,
I'm running a buildfarm where most of the machines are running GNU/Linux Debian. I only have a couple of Windows machines and I wished to balance the compilation load on the Linux machines. But I couldn't cross-compile DMUCS for Windows. So I patched it and it works now. I only patched `gethost' because I didn't have time to look at the rest of the code and that's the only thing I was interested in.

The patch can be found @
http://www.tsunanet.net/~tsuna/dmucs-0.6.2_win32.patch

It also addresses some other issues (autotools stuff) so that the project can distcheck and be cross-compiled.

There is a bootstrapped tarball @
http://www.tsunanet.net/~tsuna/dmucs-0.6.2.tar.gz
from which I removed the useless stuff (actually distcheck did this automagically :P)

Let me know if you integrate these patches upstream (my email is <tsuna at lrde dot epita dot fr>).

[Tsuna]

Patch to add support for native Windows and cross compilation