#16 add compatibility page

[Marten Bandholz]

Add a page to the website in the download section about tested setups (distribution + kernel version + hardware) to give a reference for interessted people. This overview should be part of the file package as well because people do not always visit the download section at the website at all but go through the sourceforge project page.

I guess the format should be html to make it easy to maintain the website via svn.