$GNUSTEP_DEFAULTS_DIR not set/exported in GNUstep.sh

[Alex Perez]

This is a problem for me because I am working on improving WindowMaker's 
GNUstep integration. If $GNUSTEP_USER_DIR is set to ~, by default the 
Defaults/ directory is in the users' homedir, which is ugly. I place it in 
~/Library, which, incidentally is also where it is in OS X (Except it's 
named Preferences).

By default, WindowMaker puts its' defaults file in 
$GNUSTEP_USER_DIR/Defaults this path is hardcoded in serveral place in the 
WM source as $GSDIR/Defaults (when $GNUSTEP_USER_DIR is set, 
$GSDIR=$GNUSTEP_USER_DIR) This is bad. However, in WindowMaker's defense, 
since the $GNUSTEP_DEFAULTS_DIR is /never/ set by default, it has no way 
of currently doing anything else. If we make this envvar exported by 
default (as $GNUSTEP_DEFAULTS_DIR=$GNUSTEP_USER_DIR/Defaults) then I will 
be able to make WindowMaker respect this properly.

Nicola, can we pretty-please do this? I don't see any disadvantage, as 
long as the default for the envvar is set to the same place as it is now 
without it (namely, $GNUSTEP_USER_DIR\Defaults).

Cheers,
Alex Perez