[PATCH wayland-web 1/6] Put a box around all code samples

[Bill Spitzak]

This series is v4 of the patches. It includes changes suggested by Pekka 
and many other fixes.

The final patch (adding help for dependencies) still needs work to add 
links to the projects home pages, but I think the first 5 patches are ok.

Sorry for the email screwup. git send-email --compose is not working as 
documented, and is sending some email here even though I was using --to 
to try to send it to myself, and refusing to send the composed text. 
Still trying to figure this out.