New on GRDDL Logo

Dear WG,

As said during telecon, I've published all logos on a singe file.
Fromats and sizes are the same as RDF logo. Colours are various and
can change on Your preferences.

http://www.siatec.net/grddl/grddl_series_01.png

Thanks,

Simone

P.S. So I've also added a new series (the second) do You like it? I
may also add all PNGs to Our wiki.