Images don't really reference anything

[Timendus]

We have a property images now (on both programs and ROMs), which we use to store filenames of images that presumably show the gameplay. The issue, as I see it, is that we don't store those images in this database yet. So the filenames don't really reference anything that people can use.

Two solutions:

1. Remove the properties
2. Add the images

I'm in favour of the second. I propose we add a directory images to the project's root. In it we add all images using a SHA1 hash over their contents as the filename (but with the original extension of course). Then we reference those new filenames in the images properties.

Unless we wish to preserve the original image filenames for some reason..? I can't really think of one.

[Timendus]

Another solution could be to make the images property reference URLs of images, referring to places elsewhere on the internet. This would probably work fine for the CHIP-8 Archive and some other long lived sites, but we'd have to keep track of broken links and remove those. That doesn't feel very self-contained or future proof...

[pyrsmk]

I'm for the second solution, keeping the images in the database to keep consistency.