FYI: 2.2 samples pages reorganized

[Bertrand Delacretaz]

I've just committed the changes that we started yesterday at the 
Hackathon, the first page of samples now shows links to a minimum 
number of samples, the rest being on a different page.

I'd appreciate it if people could give it a try, I haven't had time to 
check all the samples yet.

All formerly existing samples should still be there for now, but the 
page building mechanism is slightly different, so please check if your 
favorite sample is still there.

-Bertrand