[MERGE] Kick off for spanish translations of the docs

[Martin Albisetti]

On Sun, May 4, 2008 at 10:28 PM, Martin Pool <mbp at canonical.com> wrote:
>  The only structural change I'd suggest is that we should link to this from
> the documentation index, and if you could be so kind also add a Spanish
> index.

I've actually added a index.es.txt
Is it something else I'm missing?
Should I add it to the English index too?  (as in "Spanish Version")