optionally set a default video/image to be displayed when no video or image is available in BIGBOX

[darrel dearth]

in bixbox would be nice if you could optionally set a default video/image to be displayed when no video or image is available so that at least its not just blank for games with no video or art.

[Jared Roehr]

Also a default image per platform. So you could just have an empty box art that says "Nintendo Wii" or "PSP" instead of the launchbox logo