deprecation of ColorSchemes preference module

[Riccardo Mottola]

Hi all,

with the development of Themes, ColorSchemes are a bit obsolete: A theme 
contains all the color specifications a COlorScheme can do and much 
more. Of course color schemes continue to work and be available.

Currently ColorSchemes can be managed with the ColorSchemes module in 
SystemPreferences (or by the equivalent module of the Preferences app in 
Backbone).

I am creating right these days a new Module for SystemPreferences which 
allows the managment of installed Themes. It works like the current 
theme selection scheme which is per-application in the Info Panel, but 
in this case the module writes in the global domain.

Essentially it is a user-friendly way to set "NSGlobalDomain GSTheme 
myTheme". I think this is truly needed for user-friendlyness in a 
GNustep workspace.

Now I think that the color schemes module is obsolete and superseded and 
that having both causes confusion.

I propose do deprecate it, that is, leave it there, but just don't build 
it and install it by default when building SystemPreferences and 
build+install the Themes one instead.

What do you think of that?

Riccardo