GNUstep Windows Installer

[Adam Fedor]

I've updated the Windows installer.  Now the system and depend  
installers are combined into one.  So you only need to install two  
installers to get GNUstep working.

http://www.gnustep.org/experience/Windows.html

I also added a Gorm.app installer.  I'll get more as I have time  
(suggestions?).  It's also easy to create your own installers - I've  
added a nsis.make file to gnustep-make to automatically create  
installers for applications (unfortunately it's currently only in  
SVN, not in any release and not in the Windows installation).