New experimental grid view for GNUstep software index

[Dr. H. Nikolaus Schaller]

Beacuse I had to fix a bug anyways, I just hacked some idea that was
floating around for a while: a grid view showing the application icon/screen
shots instead of a simple list.

        http://www.gnustep.org/softwareindex/index.php?grid=grid

This is a little experimental since it is only available for the main index of
most recent additions and not for category or full text search.

Have fun,
Nikolaus