[Gimp-web] menu structure

[Guillermo Espertino]

About the download stuff. I think it could be very nice to use O.S. 
detection in the homepage download button, just as in Mozilla website 
(and other sites too).
The download section wouldn't be altered (and a link to that section 
could be offered along the direct download button, as "other downloads" 
, but we would have a more direct  download  link, wich would be welcome 
by the newcomers, IMO.

Now the ugly part: I don't have idea on how it could be made, so I can 
provide only the feature suggestion, but not further help. :(

Any thoughts?