GDC release 0.23

[Frits van Bommel]

David Friedman wrote:
> GDC now supports 64-bit targets! A new x86_64 Linux binary is
> available and the MacOS X binary supports x86_64 and ppc64.
> 
> http://sourceforge.net/project/showfiles.php?group_id=154306
> 
> Changes:
>   * Added support for 64-bit targets
>   * Added multilib support
>   * Updated to DMD 1.007
>   * Fixed Bugzilla 984, 1013

While everyone is talking about 64-bit support, I haven't seen anyone 
make an mention of multilib support. So I thought I'd ask: what does 
that mean?

Great work, by the way.