[gatein-dev] Download links changes

I'm going to move the download links of releases, the reason is that we now have a way to list automatically all releases on gatein.org to have access to older releases and the directory to list is a mess (which conventions that changed or were not respected). I don't know any automated tools that rely on those locations, but if anyone has one, then it may require a change. I will post here once done. Thomas.